eq b $. Instead, note that $ raca + ba - b + raca - ba + b = rac2(a^2 + b^2)a^2 - b^2 $. Let $ a = e^i heta $, $ b = e^i\phi $, then compute $ S = rac2(e^2i heta + e^2i\phi)e^2i heta - e^2i\phi $. Multiply numerator and denominator by $ e^-i heta \overlinee^i heta $: - Appfinity Technologies