$\int\left(2x-x^4\right)\ln\left(x\right)d^2$
$25y^2+70yz+49^2$
$81\cdot2$
$4z^2-16z=36$
$\int\frac{\arccos\left(x\right)}{x^2}dx$
$\lim_{x\to-\infty}\left(\frac{\sqrt{2x^6-2x^2}}{-x^2+2x-4}\right)$
$-40\cdot\left(-5\right)$
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