$b^5+b^2+b$
$\frac{\csc^2\left(x\right)-1}{\cos^2\left(x\right)}=\csc^2\left(x\right)$
$cosx\left(tanx+secx\right)$
$\int\left(-x-4\right)^6\:dx$
$4+x^2=20.$
$-7x^2+3x^2$
$4-3\left(4m-2\right)$
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