$\frac{4x^2+3x-b}{x-2}$
$\left(3n^2v^2+\frac{5}{2}n^4v^2+9\right)\left(6nv^6+8\right)$
$2cos\left(x\right)=2cos\left(2x\right)$
$6x^2+x+4x+2+4x^3+2x^2+5$
$-x^3+x^2+6x$
$3^{5x-1}=27^{4x+2}$
$\left(2x^3+7x^2\right)$
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