$\int\frac{\left(2x^2-5x+2\right)}{x^3+x}dx$
$\int\frac{1}{\left(ax^2+b\right)}dx$
$\left(t^3+4v^2\right)^2$
$5x-7=-7$
$27a^3-189a^2b+44+1ab^2-343b^3$
$4x^2-12x-9$
$\int a+\frac{b}{x-2}+\frac{c}{x+2}dx$
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