$3^2\cdot3^3$
$\lim_{x\to-\infty}\left(\frac{3x^5-5x}{6x^2+2x-1}\right)$
$\lim_{x\to\frac{x}{2}}\left(\tan x\right)^{2\cos x}$
$\int4x\cdot\ln\left(x^2\right)dx$
$20\sin^2\left(x\right)-31\sin\left(x\right)+12=0$
$7a\:+\:7b\:-\:7c\:-\:7$
$\left(5y-1\right)^2$
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