$\frac{1}{1+cscx}-\frac{1}{1-cscx}=2\:tanx\:secx$
$z^2-2z^2+25z^2+12z^2+8z^2$
$\sqrt[5]{\frac{-3125t^5}{y^{40}}}$
$\frac{5xz\left(6+3y\right)}{1+5xz\left(6+3y\right)}$
$-.5+7$
$4y-20y+25$
$\sqrt[4]{2m^5}$
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