- If x
^{2}looks like x squared,**begin here**. -

- Otherwise
**begin here**. -

In this case it is assumed that your browser (or your "terminal") does not support superscripts and subscripts. Presumably, the symbol for x squared, "x^{2}", looks the same as the symbol "x2".In this sequence of pages the caret or roof character '^' will be used for exponents. That is, "x squared" will be represented as "x^2".

Similarly, the underscore character '_' will be used for subscripts. That is, "x with subscript 2" will be represented as "x_2".

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