$\frac{3\pi}{4}+\frac{\pi}{2}$
$\frac{1}{11}-\frac{1}{11}+2$
$\left(4a^4-9b^2c^2\right)$
$2x^2-11x-124$
$25x^2-x+9$
$\lim_{x\to0}\left(1-sin\left(5x\right)\right)^{\cot\left(x\right)}$
$\frac{d}{dx}\left(z=e^{xy^2}\right)$
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