Thanks,I can hardly express my gratitude to you for your help.

Thanks,I can hardly express my gratitude to you for your help.

I'm sorry

It's

And simplify is O'K

Then I want to ask

using which code can get the answer

I'm sorry

It's

And simplify is O'K

Then I want to ask

using which code can get the answer

@Axel Vogt 

Yes, I want to copy the latex code to the maple

Thank you. This program is working really well.

Thank you. This program is working really well.

@Joe Riel Thank you. This program is working really well.

@Joe Riel Thank you. This program is working really well.

Then why the source program has the "> ". just like below:

> with(plots):
> data:=[]:
> for i from 1 to 10 do
> phi:=2*Pi/10*i:
> data:=[op(data),
> tubeplot([-t^1.5/5,3*cos(t+phi),3*sin(t+phi)],t=0..8*Pi,
> radius=t/8,scaling=constrained,grid=[60,15])]:
> od:
> display(data,insequence=true,orientation=[107,56]);

what I mean is that it must have something to provide convenience

Then why the source program has the "> ". just like below:

> with(plots):
> data:=[]:
> for i from 1 to 10 do
> phi:=2*Pi/10*i:
> data:=[op(data),
> tubeplot([-t^1.5/5,3*cos(t+phi),3*sin(t+phi)],t=0..8*Pi,
> radius=t/8,scaling=constrained,grid=[60,15])]:
> od:
> display(data,insequence=true,orientation=[107,56]);

what I mean is that it must have something to provide convenience