$a^2+2^2a+c$
$\frac{e^x-e^{-x}}{e^x+e^x}$
$x^3+2^2-x-2$
$\int\left(7x^2+1+\frac{3}{x^2+1}\right)dx$
$y'=\left(3x+1\right)cos\:y$
$x^3+4x^2-4x-16$
$\left(q-\frac{1}{2}p\right)\left(q+\frac{1}{2}p\right)$
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