\(\rm \left[ {\frac{{{{\cos }^2}A\left( {\sin A\, + \,\cos A} \right)}}{{cose{c^2A}\left( {\sin A\, - \,\cos A} \right)}}\, + \,\frac{{{{\sin }^2}A\left( {\sin A\, - \,\cos A} \right)}}{{{{\sec }^2}A\left( {\sin A\, + \,\cos A} \right)}}} \right]\,\left( {{{\sec }^2}A\, - \,cose{c^2}A} \right)\, = \,?\)