$7w^2+4w-6+w^2-11w+13$
$a+b+c-d-4ac+8ab-5cd+5d$
$\int\frac{5x+3}{\left(x+3\right)\left(x-1\right)}dx$
$\frac{1}{3^{4n+1}}$
$\frac{2+2}{2}$
$a^4x-b^4x-2b^2x$
$m^2+5m-6$
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