$100x^2y^8-20xy^6+y^4$
$-\frac{1}{tan^2x}=cot^2x$
$10m^3+2m^3$
$x2+6x-9=0$
$\int_{-\frac{\pi}{4}}^{\frac{\pi}{4}}e^{2x}\cdot\sin\left(3x\right)dx$
$\lim_{x\to0}\left(\frac{\sqrt{10-x}-\sqrt{8+x}}{1-x}\right)$
$-20.20+180$
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