#1
-----(10)---(10)
-10--10-----10
-10--10-----10

What do the brackets mean? Song is another brick in the wall, first solo
#2
parenthesis mean that note is optional
Fender American Standard Telecaster
Martin DC-16RE Premium

Fender Snakeskin Champ 12
#3
if its the first time u see it, it means u can play it if u want, but if its the second time, it means its a ghost note (still ringing from last time u played it)