Like standard algebra, switching algebra operators have a precedence of evaluation. The following rules are useful in this regard.
NOT operations have the highest precedence
AND operations are next
OR operations are lowest
Parentheses explicitly define the order of operator evaluation and it is a good practice to use parentheses especially for situations which can cases doubt.
Note that in Boolean algebra the operators AND and OR are not linear group operations; so one cannot solve equations by "adding to" of "multiplying" on both sides of the equal sign as is done with real, complex numbers in standard algebra.