$\frac{csc\left(x\right)}{1+sen\left(x\right)}=sec^2\left(x\right)\cdot\:\left(csc\left(x\right)-1\right)$
$\left(3b^6-4\right)^2$
$-14=7n$
$x\left(x-2\right)=0$
$ax=n$
$\left(6mnu^2-4mnu^3+2mnu\right)$
$24\cdot\frac{1}{4}$
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