77 + 33 = 100


A = A
A = B
A * A = A * B
A^2 = AB
A^2 - B^2 = AB - B^2
(A+B)(A-B) = B(A-B)
A + B = B
B + B = B
2B = B
2 = 1


1+1=1+sqrt(1)
1+sqrt(1)=1+sqrt(-1)*sqrt(-1)
1+sqrt(-1)*sqrt(-1)=1+i*i
1+i*i=1+i^2
i^2=-1
1+i^2=1+(-1)
1+(-1)=1-1
1-1=0
Therefore, 1+1=0