y'-2y=2xe^2x-x^2 2ydy-xy(2)dx=x(2)ydy-5xdx 2(x+y^4)y'=y,y|x=-2=-1 ((x)/(sqrt(x^2+y2)+y)dx+(x+y/sqrtx^2+y^2)dy=0 xy''=2y'ln y/x y''=x^-1 +ln x