$-28+49+-35+56$
$\int\left(\frac{x^3}{3}\right)dx$
$\left(\sqrt[2]{x^2+1}\right)^x$
$100-20x+4x^2$
$\int_0^{\infty}\left(1+x^2\right)\cdot\left(1+\:atan\:\left(x\right)\right)$
$2x>2$
$2\cos^2x=\sin x$
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