$\lim_{x\to0}\left(\frac{\left(sinx-cosxsinx\right)}{4x^2}\right)$
$+360:-12:-11$
$\int\frac{1}{x^4+2x^3-2x-1}dx$
$\frac{\left(3x^4-27\right)}{x+2}$
$\frac{x}{x+1}+\frac{x}{x-2}=\:1$
$\int x^{-\frac{3}{7}}dx$
$\left(2x-1\right)\left(x-2\right)$
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