dx multiply by ( exponent of (x divide by y) plus 1) plus dy multiply by ( minus x divide by y plus 1) multiply by exponent of (x divide by y) equally 0

dx multiply by ( exponent of (x divide by y) plus one) plus dy multiply by ( minus x divide by y plus one) multiply by exponent of (x divide by y) equally zero

dx(exp(x/y)+1)+dy(-x/y+1)exp(x/y)=0

dxexpx/y+1+dy-x/y+1expx/y=0

dx*(exp(x/y)+1)+dy*(-x/y+1)*exp(x/y)=O

dx*(exp(x divide by y)+1)+dy*(-x divide by y+1)*exp(x divide by y)=0