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Au = [T*cos(a)*cos(A(kk-1)+((T*v*sin(a))/(2*L)))-((T^2)*v*cos(a)*sin(a)*sin(A(kk-1)+((T*v*sin(a))/(2*L))))/(2*L) (((T^2)*v*cos(a)*cos(A(kk-1)+((T*v*sin(a))/(2*L)))*sin(a))/(2*L))+T*cos(a)*sin(A(kk-1)+((T*v*sin(a))/(2*L))) T*sin(a)/L;(-T)*v*cos(A(kk-1)+((T*v*sin(a))/(2*L)))*sin(a)-((T^2)*(v^2)*(cos(a)^2)*sin(A(kk-1)+((T*v*sin(a))/(2*L))))/(2*L) ((T^2)*(v^2)*(cos(a)^2)*cos(A(kk-1)+((T*v*sin(a))/(2*L))))/(2*L)-T*v*sin(a)*sin(A(kk-1)+((T*v*sin(a))/(2*L))) (T*v*cos(a))/L;(v*cos(a)*cos(A(kk-1)+((T*v*sin(a))/(2*L))))-(T*(v^2)*cos(a)*sin(a)*sin(A(kk-1)+((T*v*sin(a))/(2*L))))/(2*L) ((T*(v^2)*cos(a)*cos(A(kk-1)+((T*v*sin(a))/(2*L))))/(2*L))+v*cos(a)*sin(A(kk-1)+((T*v*sin(a))/(2*L))) (v*sin(a))/L];