$\frac{7^7}{7^4}$
$\frac{216-r^3}{6+r}$
$\ln\left(8\right)=\ln\left(x+2\right)-\ln\left(14\right)$
$\left(4x^2-3x\right)^3$
$x4m-16m$
$4xe3+4x$
$\left(x-7\right)^2=81$
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