$\left(x^{-4}\cdot x\right)^{\frac{5}{6}}$
$\int\frac{x^2}{\left(x^2+36\right)}dx$
$x+2y-9x-18y+15x+4y$
$\left(5x\:+\:4\right)\:\left(5x\:+\:8\right)$
$30\::\:\left(-5\right)\:+\:2$
$x^2-\left(x-4\right)^2=128$
$\lim_{x\to0}\left(\frac{3x^2+9x-1}{3x}\right)$
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