can someone help me solve this

[lavish oriole]

R/L denote the constant lens, phii & theta just mean angles, what exactly you want?

[wide sandal]

I don't see any symbols. Just letters. Can you not see/read what the letters indicate?

[quartz willow]

nvm i got it

[fair shadow]

If you are done with this channel, please mark your problem as solved by typing .close

[quartz willow]

.close