$\left(1+tan\left(x\right)\right)\cdot\frac{sin\left(x\right)}{sin\left(x\right)+cos\left(x\right)}=\tan\left(x\right)$
$\left(x+1\right)\left(3x^3-x^2+4x+1\right)$
$\left(a+12\right)\left(a+5\right)$
$\int\:\frac{5x^3-122x-5}{x^2-25}dx$
$10.791+2715$
$\int5x^3e^{-2x}dx$
$\left(\frac{-3x+36}{2}\right)^2$
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