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.