Question

 \frac{17b*b ^{3} }{5b}


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Answer 1

$\frac{17b*b^3}{5b}= \frac{17b^4}{5b}= \frac{17b^3}{5}$

Answer 2

$\frac{17b( b^{3}) }{5b} = \frac{17 b^{3} }{5}$