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Use the quotient rule to solve this question. The formula is:
`f'(x) = (BT' - TB')/ B^2`
Where B and T are bottom function and top function, respectively.
Substitute all into the formula.
Simplify the equation.
Combine like-terms and divide each term by `x^2` .
`f'(x)= (8x^3+3x^2)/x^2= 8x+3`
The answer is: `f'(x)=8x+3`
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