$9x\:+11y\:=-14$
$\int\left(\frac{2x+21}{2x^2+9x+-5}\right)dx$
$\left(16b^2-81\right)$
$\int\left(12\tan\left(2x\right)^5\right)dx$
$\lim_{x\to0}\left(\frac{2-2\cos\left(5x\right)}{\sin\left(5x\right)}\right)$
$-\:1928\:-\:8132\:$
$49x^3y^2-x^8y^4$
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