$\int x\sqrt{9-x^4}dx$
$2\left(sec\left(x\right)tan^2\left(x\right)\right)=0$
$\lim_{x\to\infty}\left(2^x+2^{-x}\right)$
$3.77\cdot0.5$
$8m+7\ge31$
$\left(5x^2+2\right)\left(5x-2\right)$
$\left(-1\right)^n\left(\frac{2^n}{3^n+n}\right)x^n$
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