$\frac{\sin\left(b\right)}{\cos\left(b\right)}+\frac{1}{\cos\left(b\right)}=\frac{1}{\frac{1}{\cos\left(b\right)}-\frac{\sin\left(b\right)}{\cos\left(b\right)}}$
$-\left(3x+6\right)\left(3x+4\right)$
$\left(3e^{\left(x\right)}tany\right)dx+\left(\left(1-e^{\left(x\right)}\right)sec^{\left(2\right)}y\right)dy=0$
$2x^{2-2x+1}$
$\int x\:\tan\left(4x^2\right)dx$
$\left(2x^3+7\right)\left(3x^3-4\right)$
$\left(5x^2+4\right)\left(5x^2-4\right)$
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