$\frac{-2}{x}+\frac{7}{\left(x-1\right)}$
$2sinx+cscx=0$
$\ln e^{3x}=12$
$\left(x^5\:+\:7x^3\:-\:5x\:+\:1\right):\left(x^3\:+\:2x\right)\:$
$\frac{\left(\tan x+1\right)\left(\tan x-1\right)-\sec^2x}{\tan x}$
$\frac{7}{3}a^5\:\:-\frac{1}{4}8a^2$
$\frac{x^3+3x^2+2x}{x+2}$
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