Sometimes it is necessary to enter more complex mathematical expressions. What has been written about entering mathematical expressions into a single blue box holds equally true for entering expressions into any of the blue boxes produced by clicking a button of the Answer Editor keypad. One can place the cursor in one of these boxes and enter an expression 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. The user must know when these are necessary. In particular, when there is an expression consisting of more than one symbol that must be raised to a power, one may need to enclose it in parentheses, just as in writing; otherwise, only the final symbol (just before the exponent) will be raised to the specified power.