@nm 

I just intalled the Physis package from the cloud. 

Physics:-Version();

shows The "Physics Updates" version in the MapleCloud is 1882 and is  the same as the version installed in this computer, created 2025, December 1, 6:58 hours Pacific Time. 

Now I can install and use 2025.2 without issues? Windows 11 25H2

By the way, due to this issue, I had no possibility to generate LaTeX code whit the help of latex() command.

When I encountered this issue, I asked Deepseek about it. I was answered, that Physics package has some incompartibility with performance of new version. A new patch of Maple should solve the issue. 

Empirically, I found that code

interface(typesetting = standard)

solves a part of errors, but not all.

Finally, I re-installed v. 2025.1 back and have no issue.

@vv 

Thank you!

@vv 

I had to check the type of sin and similar expressions

@vv 

Indeed, this button is useless :(

@Kitonum 

Thanks, surprisingly easy...

It is desirable to have the full list of changes/improvements in this release with demonstration of new features. For comparison, Wolfram Research describes in details each new release of its software.

Please, clarify you questions.

What do you mean under "transition matrix"?

Yes, it's possible to convert any help page into a worksheet, apply styles and build a new Help System on the base of converted sheets. Interesting workaround, but time-consuming.....

Result is the same. I'll try to reinstall later.

@Carl Love 

Maybe, my installation of Maple is corrupted?

@maple2015 

Please, go tp Tools > Options... > Precision and adjust parameter "Limit expression length to..." or uncheck it.

@tomleslie 

Thank you, this works.....

@acer 

Thank you. I'm aware of other dsolve options. In fact, I solve a multi-point BVP (not presented in the question), reduced to two-point one. Using Array is more appropritate for a number of reasons. And, at last, the question was about a way of calculation of y'' with use of values of a function and y'.