See please the attach.
n<=21 - all OK!

n>21 - not OK

Why?

TubeMChS.sm (66.92 KiB) downloaded 790 time(s).

Указать численную оптимизацию.

Wrote

Указать численную оптимизацию.

Спасибо!
И много таких подводных камней в SMath?

Wrote

... И много таких подводных камней в SMath?

Hi. That's not SMath pitfalls. It's a feature: SMath remembers the intermediate steps of what it's calculating, unless you tell it to forget them, with eval. This also usually speeds up the following steps.



Best regards.
Alvaro.