$5x^2+9y^3-6y^3+2xy+4y^3-5x^2$
$\lim_{x\to0}\left(4x^2e^x\right)$
$\int_0^1\left(x^n\right)dx$
$x^2x\frac{2}{5}$
$144x^2-192x+64$
$\frac{x^3+4x^2-x+9}{x-7}$
$5x^4-3x^3+7x^2-4;\:x=0$
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