$\left(x-3\right)\left(x^2+2x+7\right)$
$\left(-4y+5z\right)\left(-3z+2y\right)$
$\cos2x=\left(1+\sin x\right)\left(1-\sin x\right)$
$\int\frac{-4x^3-4x^2+22x+36}{-2x^2+3x+5}dx$
$\lim_{x\to0}\left(\frac{e^{3x}-1}{3x}\right)^{\frac{1}{x}}$
$6\:+\:6x\:-\:x^2$
$3\tan\left(x\right)=-11$
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