$5-3x+x=19$
$\frac{x^3+2x^3+4}{x^3+2x^2+1}$
$\frac{5x-2}{\left(5x+4\right)^2}$
$\left(-2800-1400\right)$
$\left(5x\right)^2+4\left(5x\right)-12$
$\arccos\left(-\sqrt{\frac{2}{2}}\right)$
$\left(10g+11h^3\right)\left(10g-11h^3\right)$
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