11/21/201711/21/2017 The indefinite, the definite, and so on. Codes: part 74 using SymPy @vars x X=x^2 subs(expand(x*subs(expand(x*subs(X,x^2,x+1)),x^2,x+1)),x^2,x+1 ) Advertisements 共有:TwitterFacebookGoogleLike this:Like Loading...