(four (x^ three)y-15x^ two -y)dx+(x^ four +3y^ two -x)dy= zero
(4(x cubed )y minus 15x squared minus y)dx plus (x to the power of 4 plus 3y squared minus x)dy equally 0
(four (x to the power of three)y minus 15x to the power of two minus y)dx plus (x to the power of four plus 3y to the power of two minus x)dy equally zero
(4(x3)y-15x2-y)dx+(x4+3y2-x)dy=0
4x3y-15x2-ydx+x4+3y2-xdy=0
(4(x³)y-15x²-y)dx+(x⁴+3y²-x)dy=0
(4(x to the power of 3)y-15x to the power of 2-y)dx+(x to the power of 4+3y to the power of 2-x)dy=0