Frequent Questions about our Solver

The problem

Click to see the original problem

How do you do put it together?

Answer provided by our tutors

Your entry is correct other than a blank line (but the solver is ignoring the blank line).  Note that '9' is expressed as '3^2'.  The representation of a number by its prime factorization is standard with the software and its use can be viewed as a "best practice". For example, when working with fractions it is not immediately obvious that "91/28" has any cancellations at all, while the prime-factored version, "(7 * 13) / (2*2 * 7)", has an obvious cancellation of sevens.

Finally, clicking on a particular solution step allows you to review the logic which is employed:

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