@janhardo 

No, you misunderstood my question. My question is about the code I sent. That image shows the results, but the code doesn't give the correct results. I wanted to know the errors in the code.

@nm 

Thank you very much.

@nm 

These are the steps that I wrote in order.

@Alfred_F 

Thanks

@Alfred_F 

No, there is no need for the equation you mentioned. With those substitutions in the image, the equation is completely solved.

@nm 

Thanks, but those parts are very important to me, for example, f is X and the derivative of f is Y and the rest.

@nm 

Hi,

How do we get from equation 1 to equation 3 with Maple by converting equations 2?

Download convert.mw

@Mariusz Iwaniuk 

Much obliged.

@nm 

I appreciate it.

@mmcdara

 thanks

Hi, 

Help 

@Carl Love 

Thank you for taking the time to do this.

@Carl Love 

I change 𝛯(𝜑), but it gives an error, what is the reason?

solutions:

J03.mw

@Carl Love 

I’M REALLY GRATEFUL.

@dharr 

The program does not run and the system hangs.