$7x^6+x^3+2x+5x=x^2$
$-12\cdot\frac{3}{4}$
$a=27^{9^{-4^{-2^{-1}}}}$
$\frac{\left(n^5+1\right)}{\left(n^2+1\right)}$
$-2x^2-2x-5$
$\left(a^2-2b^m\right)\left(a^2+2b^m\right)$
$-11+4-1$
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