$\int\frac{x+1}{e^{x}}dx$
$\left(21z^2+z-2\right)$
$y'\:+y\:=-x^2$
$\frac{t}{\sqrt{5t+3}}$
$4+\left(-2\right)^2$
$x+1\sqrt{x^3}+x+28$
$\frac{x}{4}+8=5$
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