$\left(-9\right)x\left(-11\right)x\left(-5\right)$

$4x^2\left[\right]x+9$

$-\left(-3\right)+\left(-44\right)$

$\frac{x^2}{8+2x^2}$

$36x^2-x+16$

$\left(6x^2-y^2x^4\right)\left(6x^2+y^2x^4\right)$

$\left(\frac{480}{31200}\right)+\left(-\frac{1920}{3307.5}\right)+\left(+\frac{1920}{1575}\right)+\left(+\frac{480}{360}\right)+\left(\frac{1536}{985.359375}\right)+\left(-\frac{320}{2450}\right)+\left(-\frac{240}{11088}\right)$