$\frac{x^2+3x-3}{x+2}$
$9a^2-6ab+6ab-4b^2$
$4\sin^3\left(x\right)=3\sin\left(x\right)$
$n\left(2n+5\right)$
$\frac{1}{2}ab+\frac{2}{3}ab+\frac{1}{6}ab$
$x^2-sen\left(x+y\right)=1$
$\frac{tanx}{cscx}+cosx$
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