A Math Equation Editor

Enter a formula by typing variables and operations, or use the palette at
the right. Use **^** for exponents, **_** for subscripts, **/**
for fractions displayed horizontally, and **//** for fractions displayed
vertically. Use words like **sum**, **int**, **pi**, **sin**,
etc., for the corresponding symbols and functions. A variety of arrows are
available as **->**, **=>**, **==>**, and so on.
Relations can be negated by adding **/** at the end, as in **</**
or **<=/**. The palette at the right can create templates for you to
fill in; use the Tab key to move from one entry box to the next. Use the
arrow keys to move within the expression; in particular, use the right
arrow to end a super- or subscript.