$\lim_{t\to0}\left(\frac{\tan\left(t\right)\sec\left(6t\right)}{15t}\right)$
$\frac{m^{8n}}{m^n}$
$\int\left(4e^{-7x}\right)dx$
$\left(-8\right)\left(-4\right)\left(-6\right)$
$\left(a^6+7\right)\left(x^3-6\right)$
$-4\cdot\left(9-11\right)$
$r^{2\:}+\:6r\:+\:9$
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