These are simple 2 key expansions for some very commonly used LaTeX elements:
`^ Expands To \Hat{<++>}<++>
`_ expands to \bar{<++>}<++>
`6 expands to \partial
`8 expands to \infty
`/ expands to \frac{<++>}{<++>}<++>
`% expands to \frac{<++>}{<++>}<++>
`@ expands to \circ
`0 expands to ^\circ
`= expands to \equiv
`\ expands to \setminus
`. expands to \cdot
`* expands to \times
`& expands to \wedge
`- expands to \bigcap
`+ expands to \bigcup
`( expands to \subset
`) expands to \supset
`< expands to \le
`> expands to \ge
`, expands to \nonumber
`~ expands to \tilde{<++>}<++>
`; expands to \dot{<++>}<++>
`: expands to \ddot{<++>}<++>
`2 expands to \sqrt{<++>}<++>
`| expands to \Big|
`I expands to \int_{<++>}^{<++>}<++>(again, notice the convenient place-holders)
In addition the visual mode macros are provided:
`( encloses selection in \left( and \right)
`[ encloses selection in \left[ and \right]
`{ encloses selection in \left\{ and \right\}
`$ encloses selection in $$ or \[ \] depending on characterwise or
linewise selection