$\frac{7\cdot6\cdot5\cdot4}{4\cdot3\cdot2\cdot1\:\:\:\:\cdot\:\:\:3\cdot2\cdot1}\left(4m^3\right)\left(125\right)$

$\int\left(x+5\right)\sqrt{2x+1}dx$

$x^3+9x^2+20x+12$

$2x+3y+4x+2y$

$6abc\left(\frac{3}{2}b^2c^5+\frac{1}{3}a^3d\right)^2$

$\left(1+\tan x\right)\times\left(1+\tan\left(y\right)\right)$

$\frac{15m^4-3m^3}{3m^2}$