$z^2+2z+z$
$x^2-y^3=4$
$\sqrt{\left(1-x^2\right)^{\frac{3}{2}}}$
$\int\left(\frac{2x+7}{\left(x-1\right)^2\left(x+1\right)}\right)dx$
$-7a^3+12ab-2b^2+2a^3-5ab+a^2$
$x^2-14x-4$
$\left(f-n+3z\right)\left(f-n-7z\right)$
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