[问题] 请问为什么画不出q和beta的图像呢

[Gravity]

想画图像，显示这样的错误
Warning, expecting only range variable beta in expression -(10+2*(beta^3*m-beta^3*n-beta^2*m+2*beta^2*n+beta^2*w-10*beta^2+beta*m-2*beta*n+10*beta+n-10)/(3*beta^2-4*beta+3))*(beta^3*m-beta^3*n-beta^2*m+2*beta^2*n+beta^2*w-10*beta^2+beta*m-2*beta*n+10*beta+n-10)/(3*beta^2-4*beta+3)+w*(beta^3*m-beta^3*n-beta^2*m+2*beta^2*n+beta^2*w-10*beta^2+beta*m-2*beta*n+10*beta+n-10)/(3*beta^2-4*beta+3)+(beta*m+(1-beta)*n)*(beta^3*m-beta^3*n-beta^2*m+2*beta^2*n+beta^2*w-10*beta^2+beta*m-2*beta*n+10*beta+n-10)/(3*beta^2-4*beta+3) to be plotted but found names [m, n, w]

多谢各位！