comparing 2 values (=, >, <, >=, <=) for T/F answers
-ex: [=A1<5] => true
can also compare functions:
-ex: [=sum(A1:A3)=average(A1:A3)] => false
"and","or","not" functions
1. T/F =and(sum(A1:A3)=6,average(A1:A3)=6)
2. =or(sum(A1:A3)=6,average(A1:A3)=6)