$lny=ln\left(\left(4\right)^{\frac{4}{x}}\right)$
$\:\:\frac{x^4-x^3+x-1\:}{x^2-1}\:$
$8m^{3}-64n$
$2x^2y-16xy+28y$
$\left(x+\frac{2}{x}\right)\left(x^2-2+\frac{4}{x^2}\right)$
$2sin\left(x\right)-2=-1$
$64b^2-40b+100$
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