four *dx*x- three *dy*y=- two *dx*x*y^ two + three *dy*x^ two *y

4 multiply by dx multiply by x minus 3 multiply by dy multiply by y equally minus 2 multiply by dx multiply by x multiply by y squared plus 3 multiply by dy multiply by x squared multiply by y

four multiply by dx multiply by x minus three multiply by dy multiply by y equally minus two multiply by dx multiply by x multiply by y to the power of two plus three multiply by dy multiply by x to the power of two multiply by y

4*dx*x-3*dy*y=-2*dx*x*y2+3*dy*x2*y

4*dx*x-3*dy*y=-2*dx*x*y²+3*dy*x²*y

4*dx*x-3*dy*y=-2*dx*x*y to the power of 2+3*dy*x to the power of 2*y