$\int\frac{e^{2x}}{1+e^{ax}}dx$
$\left(3a^2-2\right)\left(4a^2+2\right)$
$\frac{d^2}{dx^2}\left(9-\frac{8}{x}\right)$
$2\left(a+b-3\left(a-5\right)=18\right)$
$\left(-6\right)\left(-1\right)\left(-3\right)$
$5x+6=8x+39$
$\lim_{x\to-\pi}-\left(\left(x+\pi\right)cscx\right)$
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