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 Author Comment/Response Bill Simpson 09/03/12 11:34pm I don't believe what you showed and what you want are equal. In[1]:= Exp[4]+Exp[7]==Exp[4+7] Out[1]= False In[2]:= Exp[4]+Exp[7]//N Out[2]= 1151.23 In[3]:= Exp[4+7]//N Out[3]= 59874.1 Did you perhaps mean multiply instead of add??? In[4]:= Exp[4]*Exp[7]==Exp[4+7] Out[4]= True That automatically simplifies to what you asked for. In[5]:= Exp[x[1]^2]*Exp[y[1]^2]*Exp[z[1]^2]*Exp[x[n]^2]*Exp[y[n]^2]*Exp[z[n]^2] Out[5]= Exp[x[1]^2+x[n]^2+y[1]^2+y[n]^2+z[1]^2+z[n]^2] But if you really want what you asked for then In[6]:= Exp[Exp[x[1]^2]+Exp[y[1]^2]+Exp[z[1]^2]+Exp[x[n]^2]+Exp[y[n]^2]+Exp[z[n]^2]//.Exp[u_]->u] Out[6]= Exp[x[1]^2+x[n]^2+y[1]^2+y[n]^2+z[1]^2+z[n]^2] I knew how to do that based on LOTS of study and practice with Mathematica patterns. Look at FullForm[yourexpression] to see what it is without Mathematica trying to hide behind the gui interface. Then experiment with patterns that match the structure of what you see in that FullForm output. With that hint and enough study and practice and failure and patience you too can start to get the hang of patterns in Mathematica URL: ,

 Subject (listing for 'Collecting terms in an expression') Author Date Posted Collecting terms in an expression Sami 09/02/12 3:01pm Re: Collecting terms in an expression Bill Simpson 09/03/12 11:34pm Re: Re: Collecting terms in an expression Sami 09/04/12 12:48pm Re: Re: Re: Collecting terms in an expression Bill Simpson 09/04/12 10:29pm Re: Re: Re: Re: Collecting terms in an expression Sami 09/06/12 00:45am Re: Re: Re: Re: Re: Collecting terms in an expr... Bill Simpson 09/06/12 11:36am Re: Re: Re: Re: Collecting terms in an expression Sami 09/06/12 01:14am Re: Re: Re: Re: Re: Collecting terms in an expr... Bill Simpson 09/07/12 2:57pm Re: Re: Re: Re: Re: Re: Collecting terms in an ... Sami 09/08/12 03:26am Re: Re: Re: Re: Re: Re: Re: Collecting terms in... Sami 09/11/12 8:12pm Re: Re: Re: Re: Re: Re: Re: Re: Collecting term... Bill Simpson 09/14/12 03:31am
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