$\sin^2\left(1+\cot^2\right)=1$
$\frac{12}{x+1}=\frac{9}{x-6}$
$\left(10m+50m^2\right)$
$\frac{d}{dy}\left(2xy+x^2y+\frac{y^3}{3}\right)$
$\left(x-2\right)^2+x\left(x-3\right)$
$\left(1+\sqrt{3}\right)^2-2\sqrt{3}$
$\left(-y^{-3}x^0\right)^8\left(y^8x^2\right)^0$
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