$1-\cos^2e=\sin^2e$
$\lim_{x\to0}\left(\frac{e^{x-1}}{sin\left(10x\right)}\right)$
$\int\left(3\left(3x+7\right)\right)dx$
$\left(-1+2i\right)^2$
$\int\frac{\sqrt{x^2-4}}{x^6}\:dx$
$\frac{d}{dx}3x^2+6lnxz-4yx^2+4e^z$
$-x^2-8x-11$
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