need all with explanation please. thank you
= Find the general solution for the following differential equations: (a) (1 – xy + x2y2) dx + (xy3 – x2) dy = 0 (b) (x + y) dx + (3x + 3y – 4) dy = 0 (c) (3x² + y2) dy – 2xy dy = 0 (d) x sin