$x^4-24x^2+144$
$\int6u^7\left(u^7+5\right)dx$
$2x\frac{dy}{dx}+4y=3x+1$
$\left(8-2k\right)^2$
$-4v=-20$
$-\frac{172}{2}$
$\int\left(\frac{2-x}{x^2+4x}\right)dx$
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