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Divide each term by to avoid the quotient rule.
`f(x) = x-3+4x^-2`
Take the derivative of each term. Use the power rule for the last term.
`f'(x) = 1-8x^-3`
Rewrite the negative exponent as a fraction.
The answer is:
`f'(x) = 1-8/x^3`
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