Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
(d/dx (-(1 + xy)x) - d/dy ((1 - xy)y) ) /((1-xy)y)
(d/dx (-(1 + xy)x) - d/dy ((1 - xy)y) ) /((1-xy)y)
Natural Language
Math Input
Extended Keyboard