$\int\left(cos3xcos4x\right)dx$
$\left(x^2+1\right)\left(x-a\right)$
$x^2-3x-2$
$\int\frac{x^2}{\left(5x+7\right)^3}dx$
$-x^2-7x-60$
$\int_{-4}^4\left(-4x\right)dx$
$x^2=-112$
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