$2\cos\left(x\right)-5=3\cos\left(x\right)-4$
$\left(2a+1\right)\left(1+2b\right)$
$\int\frac{x^3-4}{x^3+2x^2+2x}dx$
$m^2+3m-3=0$
$48y^4-3y^2$
$3.6+5.7$
$\frac{dy}{dx}\left(xy+2y=x\right)$
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