Find the value of (2a + 2B + 1) (2b-a-1) + (a-b + 1) ^ 2, where a = half, B = - 1 ^ - 1
(2a+2b+1)*(2b-a-1)+(a-b+1)²=[2*1/2+2*(-1)+1]*[2*(-1)-1/2-1]+[1/2-(-1)+1]²=(1-2+1)*(-2-1/2-1)+(1/2+1+1)²=0*(-7/2)+(5/2)²=0+25/4=25/4
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