$\int\left(14-7x\right)^{-4}dx$
$\frac{x+4}{-x^2-4x-1}$
$8x-8=40$
$\lim_{x\to-2}\:\left(x^2+x-2\right)$
$\left(-45\right)\left(-25\right)$
$\int\left(2f^2-1\right)^2dx$
$7x^2-448$
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