Question

(a+b)+(c+d)*(a+c)+(b+d)

Answer 1

(a+b)+(c+d)*(a+c)+(b+d)= a^2+ac+b^2+bc+ab+ad+b^2+bd+ca+c^2+da+dc+cb+d^2=a^2+2ac+b^2+2cb+c^2+2ab+d^2+2ad