Equation representation and back substitution

I got 4 equations and I want to back substitute them into the form I want. Is it possible to do it in Matlab?

 syms T_L J_L T_S T_d T_S Kr br T_M J_M T_EM T_l s
T_L = (1/(J_L*s^2))*(T_S - T_d);
T_S = (Kr+br*s)(T_M - T_L);
T_M = (1/(J_M*s^2))*(T_EM - T_S)
T_EM = (T_l -T_L)
% I want to combine the equations above into the form of
T_L = (X)*T_l + (Y)*T_d

I can do it by hand but it will be tedious and prone to mistakes.

Please help