$\left(10m-2n\right)^2$
$47\sqrt{2m}-74m+18$
$21-+-42$
$\frac{1}{1+cos\:x}-\frac{1}{1-cosx}=2cos\:x\:csc^2$
$\frac{8x^5+5x^3+5x^2+8x+16}{2x^3+x^2+3}$
$2\csc\left(x\right)=1$
$50-p^2=p^2$
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