$\left(\csc^2\left(x\right)-1\right)\left(1-csc^2\left(x\right)\right)$
$\frac{x^5-x^3+x}{x-2}$
$\int e^{7}dx$
$\int\left(x^2-1\right)\sqrt{x^2-2}dx$
$\int\left(3+6x\right)\left(3x^2+3x+1\right)^3dx$
$\frac{dz}{dt}=\frac{t^2}{3t}\:$
$\frac{1}{1+2x}\ge-0.1$
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