$\frac{x}{x-1}\cdot\frac{x-2}{x^2}\frac{x-1}{x-2}$
$4\left(x^2-\frac{3}{4}x+\frac{1}{4}\right)$
$\left(11x^3+5y^3+4\right)^2$
$x2+6x+2=2$
$\int\left(4-x^2\right)^{-\frac{1}{2}}dx$
$\frac{x^3+x+5}{x+1}+2x$
$\left(1+\cos\left(b\right)\right)\left(1-\cos\left(b\right)\right)$
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