$\sqrt{x^2+1}\cdot\sqrt{x^2+1}$
$\int\left(2x+3\right)^{\frac{1}{2}}dx$
$\lim_{x\to\infty}\left(\frac{x^{20}}{e^x}\right)$
$6x+9=81$
$-50+-3+7-10$
$-14=3$
$x^2+18x+162$
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