Evaluate the definite integral.

${\displaystyle \underset{0}{\overset{1}{}}}(7x-7^x)dx$

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SCALCCC$55\mathrm{.}3\mathrm{.}016.$MI$.$

Evaluate the integral.

${\displaystyle \underset{0}{\overset{\frac{}{4}}{}}}9sec()tan()d$

Use part one of the fundamental theorem of calculus to find the derivative of the function.