Getting Error: Unexpected MATLAB expression.

Help Please

*My Matlab Code:

    syms alpha beta gamma real
% write down the rotation matrices using the symbolic parameters alpha, beta, gamma
R_B1 = [1,0,0;0,cos(alpha),-sin(alpha);0,sin(alpha),cos(alpha)]...;
R_12 = [cos(beta),0,sin(beta);0,1,0;-sin(beta),0,cos(beta)]...;
R_23 = [cos(gamma),0,sin(gamma);0,1,0;-sin(gamma),0,cos(gamma)]...;

MATLAB Version: MATLAB R2013a

Answer 1

[Azzi Abdelmalek]

syms alpha beta gamma real
% write down the rotation matrices using the symbolic parameters alpha, beta, gamma
R_B1 = [1,0,0;0,cos(alpha),-sin(alpha);0,sin(alpha),cos(alpha)]
R_12 = [cos(beta),0,sin(beta);0,1,0;-sin(beta),0,cos(beta)]
R_23 = [cos(gamma),0,sin(gamma);0,1,0;-sin(gamma),0,cos(gamma)]