1. The problem statement, all variables and given/known data Good day all, My professor gave my class a packet of about 40 differential equations. I for the life of me cannot figure out how t solve these last 4! I also have an exam tomorrow morning, and would like finish these last few. I dont need them solved out, I would just like to know what kind they are a maybe a hint to get started on them! NOTE: They WILL be one of the following types: seperable Bernoulli Exact Linear Homogeneous 2. Relevant equations 1) (2x+1)dx+((x^(2)-y)/x)dy=0 2)(cos2y-sinx)dx+(-2tanxsin2y)dy=0 3)(x^(2)y+xy-y)dx+(x^(2)y-2x^(2))dy=0 4)dy/dx=(-3x^(2)y-y^(2))/(2x^(3)+3xy) 3. The attempt at a solution I have tried all sorts of ways, some take a page plus. I cant tell of these have obvious solutions or if there is a trick. Im a little worn out after solving 35 of them. Any help would be greatly appreciated! Thanks!