not sure if this is correct

Select all of the exact ODEs listed below. 2xy4 - 1) dx + 4x2y3 dy = 0 (4 cos(4x) (3x - 4y) + 3 sin(4x)) dx - 4 sin(4 x) dy = 0 2xy -1 dx + 4y2x3 dy = 0 (4 sin(4x) (3x - 4y) + 3 cos(4x) ) dx - 4 cos(4x) dy = 0