请教matlab解方程组。

>> syms a b o[a,b,o]=solve('o+(a-o)*gamma(1+1/b)=30','exp(-((30.5-o)/(a-o))^b)=0.5','(a-o)^2*(gamma(1+2/b)-gamma(1+1/b)^2) = 0.017^2');

??? Error using ==> syms at 61

Not a valid variable name.