$3x^2+4x^2-17x-6$
$xy^3dx+e^{x^2}dy$
$4x^2+36x+16$
$\cos\left(x\right)-1=\frac{\cos\left(2x\right)-1}{2\cos\left(x\right)+2}$
$x^2+13x+143$
$2\int\frac{1}{\left(x^2+2\right)^2}dx$
$\frac{2x^{-2}y^{-2}}{4y^{-5}}$
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