$f\left(x\right)=3x^3-2x^2+x$
$1+\cot\left(-x\right)=\csc^2x$
$v^2+14v$
$-9m^2-2m^2$
$\lim_{x\to\infty}\left(1+\frac{3}{x}\right)^{3x}$
$\left(x^3-1\right)^2$
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