$\frac{4\pi}{9}+\frac{4\pi}{3}$
$\left(8x^6-3y^9\right)^2$
$\left(2x^2+6x\right)-\left(-3x^2+4x\right)$
$15-\left(-24\right)$
$\sqrt{12^2+5^2}+\sqrt{10^2-8^2}$
$\frac{5+y}{5}+\frac{5+y}{5}$
$\lim_{x\to0}\left(\frac{\left(1+x\right)^n-1}{x}\:\right)$
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