$4ab-3bc$
$\left(1+sinx\right)^2+\left(1-sinx\right)^2+2\cos^2\left(x\right)$
$a^2\left(m-n\right)-4\left(m-n\right)$
$\left(sinx+xcosx\right)^2+\left(cosx-xsinx\right)^2$
$\int5xln\sqrt{x}dx$
$\frac{d^2}{dx^2}\left(x^4-3x^2y^2+y^4\right)$
$\left(6-x\right)\left(x-2\right)$
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