Simplify and Survive

I should have been happy because I was a piece up, or maybe not. That outside passed A pawn will require some attention and could draw some resources away from the kingside. My king was not in a good position to help stop the G pawn although if it stepped aside there would be a fork by the knight. Anyway, I wasn't clear on the winning technique here and my clock was running down. Black gave me the opportunity to keep it simple when he played 36... g3. I replied with 37. Ng3+ Rg3 38. Rf6+ Kg1 39. Ra6 and all three passed pawns are gone in exchange for the knight. It was a theoretical draw, but my opponent's time ran out. Tough.