Which theorem was successfully proved for the first time after 358 years of effort?
Correct answer: Fermat's Last Theorem

Republic of China
An + Bn = Cn
How about
1(1) + 1(1) = 1(1) or all of them are 0.
This is just a joke anyways

Paul Steadman
The equation is not represented correctly. The n is a power i.e. squared (which the Pythagoras theory is a good example) or cubed or just to the power of 1 i.e x+y=z.