$\int\:\frac{5x-7}{x^2+4x-5\:}dx$
$84+\left(-99\right)+33-\left(-28\right)-46$
$rs+4st$
$\left(-\frac{1}{2}x^3+\frac{1}{3}y^2\right)^2$
$\left(y\right)^2=\frac{1-y^2}{1-x^2}$
$2x=-2$
$tan\left(x\right)=cot\left(\frac{\pi\:}{2}-x\right)$
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