Thank a lot for your answer!

The differential equation is what I want. Could you tell me which command can obtain the differential equation in Maple?

Thank a lot for your answer!

The differential equation is what I want. Could you tell me which command can obtain the differential equation in Maple?

According to your suggestion, I correct my code. The programm runs smoothly.

I am very appreciated to you for your key help!!!

According to your suggestion, I correct my code. The programm runs smoothly.

I am very appreciated to you for your key help!!!

@Markiyan Hirnyk

Thank you! the code provided by you is useful for get coefficients. Furtherly, I want to sum for coefficient of similar terms, such as

given Ex:=a*x+b*y-d*z+e*y-f*x-m*z,

its basis is Base:={x,y,z}.

According to the code, the resilt is

[[x,a],[y,b],[z,-d],[y,e],[x,-f],[z,-m]].

How can I get such results:

the coefficient of x is a-f;

the coefficient of y is b+e;

the coefficient of z is -d-m.

@Markiyan Hirnyk

Thank you! the code provided by you is useful for get coefficients. Furtherly, I want to sum for coefficient of similar terms, such as

given Ex:=a*x+b*y-d*z+e*y-f*x-m*z,

its basis is Base:={x,y,z}.

According to the code, the resilt is

[[x,a],[y,b],[z,-d],[y,e],[x,-f],[z,-m]].

How can I get such results:

the coefficient of x is a-f;

the coefficient of y is b+e;

the coefficient of z is -d-m.

I will try it.

I will try it.

Thanks acer 5896 for your more explicit explaination!

Thanks acer 5896 for your more explicit explaination!

Thanks Joe Riel 4396 for your help! I will change the structure of my code to avoid it.

Thanks Joe Riel 4396 for your help! I will change the structure of my code to avoid it.

Thanks  jzivku 200 for your  help! I will change my code.

Thanks  jzivku 200 for your  help! I will change my code.

Download file.mw

I has uploaded the file which shows the results what i said. Thank you for your patient answers!