$\frac{dy}{dx}\left(x^2y^2-y^2=x^2\right)$
$2cos3x=1$
$\left(3-3.2\right)\left(2-2.6\right)$
$6-9x^2+12y-18x^2y$
$\int x\left(x^2-3x-8\right)dx$
$\frac{x^3+x+1}{x^2+x}$
$m^4+m+m^3+1$
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