$\left(\frac{2}{5}x^2+3y^3\right)\left(\frac{2}{5}x^2-3y^3\right)$

$2x\cdot3ax$

$\frac{dy}{dx}=x^3e^{4x}$

$\int_1^{e^4}\left(x^4\right)\left(\ln\left(x\right)\right)dx$

$a\left(x+4\right)+b\left(x+4\right)+c\left(x+4\right)$

$75\cdot10$

$\left(\frac{1}{4}m^{3x}n^x-\frac{3}{8}\right)^2$