$y^4-2y^3+y^2=0$

$8\left(-3-2+5\right)+5\left(-8+9-3\right)\left|6\left(-9\right)\right|$

$6a-9-a^2$

$\frac{dx}{dt}=20\left(1-e^{\frac{-t}{30}}\right)$

$\lim_{x\to0}\left(\frac{3sin\left(8x\right)}{8sin\left(3x\right)}\right)$

$150:\left(-5\right)$

$\left(x+3\right)\left(15x+12\right)$