When you have an exponent divided by another exponent, you subtract the exponents (only when it has the same base)
For example:
When you have a negative exponent, you move it to the other side of the fraction to make the exponent positive
For example:
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This is one of the ways you could have done it
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7. Divide 63 and 9
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[More information with exponents]
If you multiply an exponent directly with another exponent, you multiply the exponents together
For example:
If you multiply a variable with an exponent by a variable with an exponent, you add the exponents
For example: