$\ln x^2+2x^4$
$4m^2+8m+16$
$\left(8-6\right)-\left(3-7-2\right)+\left(1-8+2\right)$
$\left(2^{-2}\right)^{-6}$
$-2+3+1-2+4+2-4-5$
$\frac{x^3-8}{x^4}$
$-x^2-4x-1$
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