$\int secx\left(secx+tanx\right)dx$
$\int_{-\infty\:}^0\left(\frac{x}{x^2+4}\right)dx$
$z^{3n+2}\cdot3z^{n-2}$
$\cos2x=\cos x$
$6x^{a+1}\cdot x^{a-2}$
$\int_0^{\frac{1}{2}}x\ln\left(x^2\right)dx$
$-3-2-5-3-10$
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