$\int\frac{\left(x-1\right)}{\left(x^2+2x+3\right)^2}dx$
$x^3-x^2-x+x$
$a^2-2a-35$
$\int\frac{\left(4x^2-2\sqrt{x}\right)}{x}dx$
$\left(abcd+\frac{1}{2}\right)^3$
$5y^2-2y-3=0$
$n2+3n+2n$
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