$\frac{40}{x}+\frac{x}{9}$
$\int\left(e^x\cdot\cos\left(e^x\right)\right)$
$\left(-49\right)-\left(-51\right)$
$\lim_{x\to\frac{\pi}{2}}\left(\frac{\pi}{2}-y\right)tany$
$\left(2x\:+7^3\right)$
$3\left(x+1\right)+\left(3-x\right)$
$\left(4-3x\right)^4$
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