163982

M4: At line 5 of the solution the equation shows:
(a-s/2)^2 = (b-s/2)^2
BUT, (a-s/2)^2 simplifys to a^2-2as+s^2, which is not equal to a^-sa+s^2
And it's the same for the expression with 'b' as the integer value.
In line 4 of the solution, the numerator for both the expressions cannot be simplified anyway. So everything after line 4 is incorrect which shows that a is NOT equal to b so not all integers are the same.