$\frac{-4x^5+x^3+2x^2-3+1}{x+1}$
$1-2\cdot\sin\left(x\right)^2-\sin\left(x\right)=0$
$\int\left(\frac{x+arctanx}{x^2+1}\right)dx$
$\lim_{x\to\infty}\left(8+\frac{5}{n}\right)$
$\int\frac{1}{z^3}dz$
$\lim_{x\to4}\left(\frac{x^2-4}{3-\sqrt{x+7}}\right)$
$7^{8-3}\:$
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