$\csc\left(x\right)=\sin\left(x\right)+cos^2\left(x\right)csc\left(x\right)$
$\frac{dx}{dy}=\frac{-x^2}{50}+2x-48$
$5x^2<20$
$e^2^x$
$\left(m\right)+\left(3\right)^2$
$1\:-\:2\:sin^22x$
$\lim_{x\to0}\left(\frac{3}{sinx}\right)$
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