$\left(-8\right)+\left(-5\right)+\left(-13\right)+\left(-27\right)$
$-32-19-\left(24-46\right)$
$2\csc\left(x\right)=\frac{\cos\left(x\right)+1}{\sin\left(x\right)}$
$m^4-16n^2$
$x^2-8x=15$
$y^4\:-\:9y^3\:-\:10y^2$
$\left(x^2+1\right)-\left(x^3-3\right)+5$
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