$x\left(2x-9\right)=0$

$41mn^3y^5+24mn^3y^5+8mn^3y^5$

$\left(3x^3-\frac{5}{4}x^{\frac{3}{2}}-\frac{5}{7}x^{-\frac{7}{4}}\right)^2\left(3x^{-\frac{7}{4}}+\sqrt[4]{8x}\right)$

$x^2-3^2\left(x\right)-4$

$x^2+8x+4$

$\left(6-x\right)\left(x^{2\:}-9\right)$

$2p+\left(-6p-7p+1\right)+2\left(9-3p\right)+5$