Follow PEMDAS. First, do the stuff inside the brackets. Do the multiplication first. 2x-3=-6. Then add 5. -6+5=-1. Then do the multiplication. 7x9=63. So the equation is 63-8+11-6(-1). Do the multiplication at the end. 6x-1=-6. The equation is now 63-8+11-6. Now solve it from left to right. 63-8=55. 55+11=66. 66-6=60. The answer is 60. Hope this helps! ;)