$\frac{x^3+2x^2-17x+15}{x-3}$
$81+18x=x^2$
$\lim_{x\to100}\left(\frac{1-cos7x}{5x^2}\right)$
$1\cdot4\cdot4$
$\int-\frac{x}{\tanh\left(t\right)}dx$
$15bm+20b+16m+12m^2$
$8x\left(\frac{dy}{dx}\right)=2xe^x-8y+6x^2$
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