$\:2\left(3v-5\right)+8\left(5v+2\right)$
$\lim_{x\to0}\left(\frac{3x^2-4x-11}{2x+1}\right)$
$xy^{-6}\left(x^3y^9\right)$
$a+2a+3a-6a$
$\left(5x-9y\right)^3$
$\left(12x^3y^2z+11w^4\right)\left(12x^3y^2-11w^4\right)$
$\int\left(\frac{1}{\sqrt{64-x^2}}\right)dx$
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