$\frac{4^6}{8^4}$
$4n-1=n\left(2n+1\right)$
$\left(2x^2\:+\:3y\:+\:z^2\right)^2$
$\sin\left(x-90\right)$
$2^2-1^2$
$\int\left(\frac{6e^{-4x}}{e^{-4x}+7}\right)dx$
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