$\left(-10+9v\right)\left(19+9v\right)$
$2k^2+13k+11$
$\frac{\left(a^3-2^3\right)}{\left(a+2\right)}$
$9.8+2.5-4+5.4r+10.6r+6.5r$
$\int_4^0\left(\frac{3x-6}{2}\right)dx$
$75x^4-12$
$\frac{x-1}{-3}+\frac{1}{5}\le\frac{x}{2}-3$
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