$\frac{e^{-x}-1}{\left(e^{-x}+x\right)^2}$
$\int x^5e^xdt$
$\frac{144}{12}$
$x^2-17x+6<0$
$\frac{1}{n\left(n-1\right)}$
$1-19-45-134$
$\left(x^2+y\cos\left(x\right)\right)dx+\left(y^3+\sin\left(x\right)\right)dy=0$
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