Sometimes it is necessary to enter more complex mathematical expressions,
where multiple boxes are used. By placing the cursor in one of these boxes, an expression can
be entered from the keyboard, or, by clicking on a button of the Answer
Editor keypad, replace it with the structure of a new mathematical
expression. Expressions of any degree of complexity can be created in
this way.
NOTE. The Answer Editor does not supply parentheses automatically. The user must know
when they are necessary. In particular, when there is an expression
consisting of more than one symbol that must be raised to a power,
the student may need to enclose it in parentheses, just as in writing;
otherwise, only the final symbol (the one just before the exponent) will be
raised to the given power.
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