I have x1 question & x1 request

My question is that encircled letter / numbers characters that are visible in SMath under WIN11x64 but are not visible under SMath mono Ubuntu arm64 (Raspberry Pi 5). I tried installing different fonts but to no avail

My request is that I am attaching my sheet & it takes 1.5minutes in intel N150 machine & 3.7 minutes under Raspberry Pi 5. Can somone audit my sheet & tell me how to optimise it?

HCl recycle.sm (68,85 КиБ) скачан 10 раз(а).
HCl recycle.pdf (379,42 КиБ) скачан 9 раз(а).