$2x^4dy=6ydx$

$\left(4s+3t\right)\left(4s+9t\right)$

$\lim_{x\to0}\left(\frac{\sin^3\left(4x\right)\cdot\cos\left(5x\right)}{x^2\cdot\tan\left(8x\right)}\right)$

$\left(x+1\right)y'-2y=\left(x+1\right)^5$

$-20+\left(-1\right)-\left(-3\right)$

$\frac{\sqrt{\infty}}{50}$

$-3x^2+y\left(4x-1\right)+1$