$\left(\frac{3}{2}x+\frac{1}{2}y\right)^3$

$\frac{2}{3}m^6n^3\cdot\frac{5}{8}m^5n^2$

$x^3+4x=0$

$\int\left(21x^2\right)dx$

$2\left(x-5\right)\left(x-6\right)+3\left(x+5\right)\left(x-5\right)-3\left(x-5\right)^2$

$\left(5.4\right)^2-10$

$\int\frac{\sqrt{1-x}}{x^4}dx$