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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.