$\frac{x^3-1}{x^2+x}$
$\left(\sqrt{3}-a\right)^2$
$3cos^2m+sen^2m=3$
$x\left(\sin\left(x\right)-\cos\left(x\right)\right)$
$\int-14e^{-2x+\left(-42\right)}dx$
$y^2-14y+57$
$\int_{-2\cdot\pi}^{-\pi}\left(1\cdot cos\left(nx\right)\right)dx$
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