If P = 18, Q = 21, R = -6 and S = -4, Calculate \(\frac{(P- Q)^3 + S^2}{R^3}\) + S²

• A.\(\frac{-11}{216}\)
• B.\(\frac{11}{216}\)
• C.\(\frac{-43}{116}\)
• D.\(\frac{43}{116}\)
• E.