diff --git a/lua/luasnippets/tex/postfix.lua b/lua/luasnippets/tex/postfix.lua
new file mode 100644
index 0000000..e0fb378
--- /dev/null
+++ b/lua/luasnippets/tex/postfix.lua
@@ -0,0 +1,80 @@
+local ls = require 'luasnip'
+local s = ls.snippet
+local sn = ls.snippet_node
+local isn = ls.indent_snippet_node
+local t = ls.text_node
+local i = ls.insert_node
+local f = ls.function_node
+local c = ls.choice_node
+local d = ls.dynamic_node
+local r = ls.restore_node
+local events = require 'luasnip.util.events'
+local ai = require 'luasnip.nodes.absolute_indexer'
+local extras = require 'luasnip.extras'
+local l = extras.lambda
+local rep = extras.rep
+local p = extras.partial
+local m = extras.match
+local n = extras.nonempty
+local dl = extras.dynamic_lambda
+local fmt = require('luasnip.extras.fmt').fmt
+local fmta = require('luasnip.extras.fmt').fmta
+local conds = require 'luasnip.extras.expand_conditions'
+local postfix = require('luasnip.extras.postfix').postfix
+local types = require 'luasnip.util.types'
+local parse = require('luasnip.util.parser').parse_snippet
+local ms = ls.multi_snippet
+local k = require('luasnip.nodes.key_indexer').new_key
+
+local utils = require 'luasnip-latex-snippets.luasnippets.tex.utils'
+local is_math = utils.conditions.is_math
+
+local as = require('luasnip').extend_decorator.apply(s, { snippetType = 'autosnippet' })
+
+local ret = {}
+
+-- dynamic node
+-- generally, postfix comes in the form PRE-CAPTURE-POST, so in this case, arg1 is the "pre" text, arg2 the "post" text
+local dynamic_postfix = function(_, parent, _, user_arg1, user_arg2)
+  local capture = parent.snippet.env.POSTFIX_MATCH
+  if #capture > 0 then
+    return sn(
+      nil,
+      fmta(
+        [[
+        <><><><>
+        ]],
+        { t(user_arg1), t(capture), t(user_arg2), i(0) }
+      )
+    )
+  else
+    local visual_placeholder = ''
+    if #parent.snippet.env.SELECT_RAW > 0 then
+      visual_placeholder = parent.snippet.env.SELECT_RAW
+    end
+    return sn(
+      nil,
+      fmta(
+        [[
+        <><><><>
+        ]],
+        { t(user_arg1), i(1, visual_placeholder), t(user_arg2), i(0) }
+      )
+    )
+  end
+end
+
+local function postfix_std(trig, result_start, result_end)
+  return postfix(
+    { trig = trig, snippetType = 'autosnippet' },
+    { d(1, dynamic_postfix, {}, { user_args = { result_start, result_end } }) },
+    { condition = is_math, show_condition = is_math }
+  )
+end
+
+-- table.insert(ret, postfix_std('vec', '\\vec{', '}'))
+-- table.insert(ret, postfix_std('hat', '\\hat{', '}'))
+-- table.insert(ret, postfix_std('dot', '\\dot{', '}'))
+-- table.insert(ret, postfix_std('bar', '\\bar{', '}'))
+
+return ret
diff --git a/lua/luasnippets/tex/ranges.lua b/lua/luasnippets/tex/ranges.lua
new file mode 100644
index 0000000..31d36f4
--- /dev/null
+++ b/lua/luasnippets/tex/ranges.lua
@@ -0,0 +1,87 @@
+local ls = require 'luasnip'
+local s = ls.snippet
+local sn = ls.snippet_node
+local isn = ls.indent_snippet_node
+local t = ls.text_node
+local i = ls.insert_node
+local f = ls.function_node
+local c = ls.choice_node
+local d = ls.dynamic_node
+local r = ls.restore_node
+local events = require 'luasnip.util.events'
+local ai = require 'luasnip.nodes.absolute_indexer'
+local extras = require 'luasnip.extras'
+local l = extras.lambda
+local rep = extras.rep
+local p = extras.partial
+local m = extras.match
+local n = extras.nonempty
+local dl = extras.dynamic_lambda
+local fmt = require('luasnip.extras.fmt').fmt
+local fmta = require('luasnip.extras.fmt').fmta
+local conds = require 'luasnip.extras.expand_conditions'
+local postfix = require('luasnip.extras.postfix').postfix
+local types = require 'luasnip.util.types'
+local parse = require('luasnip.util.parser').parse_snippet
+local ms = ls.multi_snippet
+local k = require('luasnip.nodes.key_indexer').new_key
+
+local utils = require 'luasnip-latex-snippets.luasnippets.tex.utils'
+
+local is_math = utils.conditions.is_math
+local as = require('luasnip').extend_decorator.apply(s, { snippetType = 'autosnippet' })
+
+local ret = {}
+--
+-- table.insert(
+--   ret,
+--   as(
+--     {
+--       trig = 'rancc',
+--       regTrig = true,
+--       name = 'range closed close',
+--       dscr = 'ranges typing x_ -> x_{}',
+--     },
+--     fmta([[ \left[ <> ; <> \right] ]], {
+--       i(1),
+--       i(2),
+--     }),
+--     { condition = is_math }
+--   )
+-- )
+
+local leters = { 'c', 'o' }
+for index, value in ipairs(leters) do
+  for index2, value2 in ipairs(leters) do
+    local char1
+    local char2
+    if index == 1 then
+      char1 = '['
+    else
+      char1 = ']'
+    end
+    if index2 == 1 then
+      char2 = ']'
+    else
+      char2 = '['
+    end
+    table.insert(
+      ret,
+      as(
+        {
+          trig = 'ran' .. value .. value2,
+          regTrig = true,
+          name = 'range ' .. value .. value2 .. ' - ' .. char1 .. char2,
+          dscr = 'ranges',
+        },
+        fmta('\\left' .. char1 .. ' <> ; <> \\right' .. char2, {
+          i(1),
+          i(2),
+        }),
+        { condition = is_math }
+      )
+    )
+  end
+end
+
+return ret
diff --git a/lua/luasnippets/tex/tex.lua b/lua/luasnippets/tex/tex.lua
new file mode 100644
index 0000000..dc7338a
--- /dev/null
+++ b/lua/luasnippets/tex/tex.lua
@@ -0,0 +1,53 @@
+local ls = require 'luasnip'
+local s = ls.snippet
+local sn = ls.snippet_node
+local isn = ls.indent_snippet_node
+local t = ls.text_node
+local i = ls.insert_node
+local f = ls.function_node
+local c = ls.choice_node
+local d = ls.dynamic_node
+local r = ls.restore_node
+local events = require 'luasnip.util.events'
+local ai = require 'luasnip.nodes.absolute_indexer'
+local extras = require 'luasnip.extras'
+local l = extras.lambda
+local rep = extras.rep
+local p = extras.partial
+local m = extras.match
+local n = extras.nonempty
+local dl = extras.dynamic_lambda
+local fmt = require('luasnip.extras.fmt').fmt
+local fmta = require('luasnip.extras.fmt').fmta
+local conds = require 'luasnip.extras.expand_conditions'
+local postfix = require('luasnip.extras.postfix').postfix
+local types = require 'luasnip.util.types'
+local parse = require('luasnip.util.parser').parse_snippet
+local ms = ls.multi_snippet
+local k = require('luasnip.nodes.key_indexer').new_key
+
+local utils = require 'luasnip-latex-snippets.luasnippets.tex.utils'
+
+local is_math = utils.conditions.is_math
+
+local as = require('luasnip').extend_decorator.apply(s, { snippetType = 'autosnippet' })
+
+local ret = {
+  as(
+    {
+      trig = '(%a)_',
+      regTrig = true,
+      name = 'auto subscript underscore',
+      dscr = 'Auto subscript: typing x_ -> x_{}',
+    },
+    fmta([[<>_{<>}]], {
+      f(function(_, snip)
+        return snip.captures[1]
+      end),
+      i(1),
+    }),
+    { condition = is_math }
+  ),
+}
+
+return {}