$\lim_{x\to0}\left(\frac{x^2-1}{x^2+2}\right)^{x^2}$
$\frac{4x^2+18x+14}{x+3}$
$\sin\left(x-\frac{\pi}{4}\right)=-0.94$
$d^6\cdot d^{-6}\cdot d^9$
$x ^ { 2 } + 2 x + 3$
$\int x^2\left(1+2x^{\frac{3}{2}}\right)^{\frac{2}{3}}dx$
$\int\frac{x^5}{\sqrt[2]{1-x^3}}dx$
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