$\left(a^2-b^2-2ab\right)\left(a-b\right)$
$\left(3+2i\right)^2+3i^{15}\left(3-2i^2\right)$
$4\cdot1-3$
$\frac{\frac{13}{14}-\frac{6}{7}}{2e-5.4}$
$\frac{d}{dx}\left(y=ln\left(\frac{x+1}{x^2}\right)\right)$
$70-\left(-101\right)$
$\frac{n^3-3n^2}{n^2-16}$
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