$-16t^2+12t+900=0$

$\int x\left(x^{\frac{1}{14}}-4sin\cdot x\right)dx$

$\lim_{x\to1}\left(\frac{2x^2-5x+3}{x-1}\right)$

$x^2^2-9$

$\left(\frac{2}{3}x+\frac{1}{2}y-4\right)+\left(\frac{1}{4}x-\frac{5}{6}y-\frac{1}{2}\right)+\left(\frac{3}{4}x-\frac{5}{3}y\right)$

$6x^5-9x^3+8-x^5-3x^{-3}+6$

$y=ry\left(s-y\right)-qy$