@Kitonum 

I am sorry for the favour of a reply in time. 

Thank you for your help. 

@Mac Dude 

Firstly, I am sorry for the favour of a reply in time.
Second, subs, yeah, it's what I want.
I also have gotten much from your letter. Thank you very much!

@Carl Love 

Thanks! But  I'm sorry to have to tell you that There is two small problems .

1, For example, p1:=a*n1+b/n2+c*(n1+n2)^2

I want p1:=a*n1+b/n2+c. yeah, it is not p1:=a*(1-n2)+b/n2+c or p1:=a*n1+b/(1-n1)+c.

2, In procedure, expression is very very long and complicated, so, sunning time of simplify(expression,relations) is very long.

Thanks again.

Thanks!

This question have been solved.

references website:http://www.mapleprimes.com/questions/133526-A-Quextion-About--ExcelToolsExport#comment133554

Thanks!

This question have been solved.

references website:http://www.mapleprimes.com/questions/133526-A-Quextion-About--ExcelToolsExport#comment133554

Thank you!

Thank you!

In recent days, I had studying ExcelTools[Export]. Unfortunately, I still can not apply it.

How can I apply ExcelTools[Export]

Thanks!

In recent days, I had studying ExcelTools[Export]. Unfortunately, I still can not apply it.

How can I apply ExcelTools[Export]

Thanks!

Thanks.

But how can I "save" a data file?

Thanks.

But how can I "save" a data file?

Thank you very much!

It is necessary for me to learn and master this software, because it is very powerfor!

Thank you for your help!

Thank you very much!

It is necessary for me to learn and master this software, because it is very powerfor!

Thank you for your help!