Given that cos z = L , whrere z is an acute angle, find an expression for \(\frac{\text{cot z - cosec z}}{\text{sec z + tan z}}\)

• A.\(\frac{1 - L}{1 + L}\)
• B.\(\frac{L^2 \sqrt{3}}{1 + L}\)
• C.\(\frac{1 + L^3}{L^2}\)
• D.\(\frac{L(L - 1)}{1 - L + 1 \sqrt{1 - L^2}}\)
• E.