y2e2x + xy3 -1 = 0
Take d/dx of each term in position. Use product rule and dx/dx = 1, dy/dx or y' is included in chain rule because y= y(x)
(2yy'e2x + y2(2e2x)) + (y3 + x(3y2y') +0 = 0
Group y' terms:
(2ye2x + 3xy2)y' = -2y2e2x - y3
The answer should be -(2y2e2x - y3)/(2ye2x + 3xy2)
The negative sign cannot be avoided, and you need to have the parentheses in place.

William C.
10/06/23