I don't know why I even took this class. All the math is so complicated. We were learning order of operations and then I get this monstrosity. Can you help me do it?
$(3+4)(2-3)=18-1$
$(2-7)^2+(1-5)=-44-33$
$(5-1)(9+8)=53+31$
$(6-2)^2-(10-13)= \ ?$