[inv {{-1,1,0},{1,-2,0},{0,0,-1}}]*{{0,0,0},{-1,1,1},{1,0,1}}*[inv {{0,0,1},{0,2,0},{1,0,0}}]

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.