$\sin y\:\sec y\:=\:\tan y$
$\frac{5x-4}{x^2+1}-\frac{4x-3}{x^2-1}$
$\int\left(3x+5\right)\cdot e^{-3x}dx$
$x-\frac{7}{2}^2$
$7\:\cdot\:3000$
$\left(\frac{x^2}{y}-\frac{y^2}{x}\right)^2$
$-5+\left(-3\right)\cdot8$
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