$\int z^{12}dz$
$m+-880=-1801$
$\frac{64}{4x^2}$
$-20-8-\left(-2-4\right)$
$13x^2\:-x+2+12^3-x^2\:+3x$
$\int\frac{2x^2-x-1}{\left(x^2+1\right)\left(x-2\right)}dx$
$2x-\left(\frac{\left(x-1\right)\left(1-ln\left(x\right)\right)}{x^2}\right)+2$
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