Simpify : `(21z^3)/(3z^3)` and `q*q^7*8*q`

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The following have to be simplified:

`(21*z^3)/(3*z^3)`

=> `(21/3)*(z^(3-3))`

=> 7*z^0

=> 7

`q*q^7*8*q`

=> `q^(1+7+1)*8`

=> 8q^9

The simplified form of `(21z^3)/(3z^3) = 7` and `q*q^7*8*q = 8*q^9`

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