how do i put cubes in a problem??? what is the symble

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If you are talking about inputting problems into the MathWay template, click on the icon that looks like a small box in the upper right hand corner of a larger box. this will allow you to input the different values, and you can cube an equation that way.  The default way to write a cubic when typing is: x^3.  The ^ sign is called a carat.