$\tan\left(c\right)+\cot\left(c\right)$
$\int\frac{3sinx+4cosx}{4sinx-3cosx}dx$
$\left(2a^2b+5\right)\left(5-2a^2b\right)$
$\frac{1}{y^2+2y+1}\frac{dy}{dx}=-\frac{4x}{x^2+2}$
$\frac{2x^3+10x^2+12x}{x^3+4x^2+x-6}$
$\left(3\cdot10\right)^7$
$6x^2+5x-1$
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