$15x^3+78x^2-31x+49\cdot9x^2$

$2^2\cdot2^2\cdot3^2\cdot3^2$

$9-2x+7$

$\sqrt{50}\left(\sin\left(-x\right)+\cos\left(\pi-x\right)\right)$

$2\left(x+3\right)-5\left(x+8\right)>0$

$\left(8x^{3}-3x^{2}\right)\text{iox}^{3}y$

$\int\left(\frac{y^3x^2}{\left(y^4-8\right)^2}\right)dy$