Symbols that aren't on my keyboard

Let's pretend you have a laptop that doesn't have a number pad and the normal alt codes Windows uses don't work.

Symbol	Name	Windows	macOS
–	en dash	`Ctrl`+`-` or `Alt`+`0150`	`Option`+`-`
—	em dash	`Alt`+`0151`	`Option`+`Shift`+`-`
™	Trademark	`Ctrl`+`Alt`+`T` or `Alt`+`0153`	`Option`+`2`