$\lim_{v\to\infty}\left(-x^{3x-6}\right)$
$10b-4b-b+2+6$
$6x^2+12x+3$
$\int\frac{x-20}{x^2-22x+121}dx$
$15x^2\:-\:11x\:+\:2$
$-5+6x\ge4x+7$
$\int\frac{1}{\sqrt{x^2+1+2x}}dx$
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