$\int\:x^3cos\left(2x^4\right)dx$
$-\frac{2x}{2}$
$m^{2\:}+\:6m\:-7$
$\int\frac{1}{\left(x+4\right)\left(2x-1\right)}dx$
$-2x^2-3$
$\frac{x^3}{1-x^3}$
$\int t^{15\:}in\left(t\right)dt$
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