$\lim_{x\to\infty\:}\left(\frac{e^{\frac{x}{2}}}{x^2+2x+3}\right)$
$27a^6b^9+64m^{12}n^{15}$
$\int_0^{\frac{\pi}{3}}\left(4secutanu\right)du$
$1=\cot\left(x\right)$
$7+25+-1$
$x^2y+4x^3y$
$\frac{2}{p-5}=\frac{-p}{9p+21}$
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