Formula to flag if value is greater than or less than 90

[Nanaia]

How would I word a formula to flag if a cell is greater than or less than 90? I want to search 2 columns (Z and AA) and tell me if any of the values are greater than or less than 90 and exclude zero's and text by putting "BRACKET" the cell the formula is in. How would I word that in a formula?

 

[Nanaia]

Thank you for your help. I appreciate it.
We're one step closer. It gives me "BRACKET" for every numeric value, even the zero's and 90's.

 

[Scott T]

Are the values from a formula? Do you have formatting that is not showing decimal places? The number is 90.000001 then it is not equal to 90 and the formula will return BRACKET.

Excel 2010
	Z	AA	AB
2	90
3	110		BRACKET
4	90	90
5	0	0
6		80	BRACKET
7
Sheet1

Cell Formulas
Range	Formula
AB2	=IF(OR(AND(ISNUMBER(Z2),Z2<>90,Z2<>0),AND(ISNUMBER(AA2),AA2<>90,AA2<>0)),"BRACKET","")
AB3	=IF(OR(AND(ISNUMBER(Z3),Z3<>90,Z3<>0),AND(ISNUMBER(AA3),AA3<>90,AA3<>0)),"BRACKET","")
AB4	=IF(OR(AND(ISNUMBER(Z4),Z4<>90,Z4<>0),AND(ISNUMBER(AA4),AA4<>90,AA4<>0)),"BRACKET","")
AB5	=IF(OR(AND(ISNUMBER(Z5),Z5<>90,Z5<>0),AND(ISNUMBER(AA5),AA5<>90,AA5<>0)),"BRACKET","")
AB6	=IF(OR(AND(ISNUMBER(Z6),Z6<>90,Z6<>0),AND(ISNUMBER(AA6),AA6<>90,AA6<>0)),"BRACKET","")
AB7	=IF(OR(AND(ISNUMBER(Z7),Z7<>90,Z7<>0),AND(ISNUMBER(AA7),AA7<>90,AA7<>0)),"BRACKET","")

 

[Nanaia]

The cells being read are from a CSV that we copy and paste without changing anything (per the boss). Columns Z & AA contain whole numbers only, no formulae. The cell formatting is "general".
Your revision resolved it. Awesome!
Thank you!! You're a rockstar!