[tex]\text{We need to find the greatest common factor}\\\\\text{This is the number that every factor is divisible by}\\\\\text{From the given numbers:}\,\, 88, 22a^2, 44a, 66a^3\\\text{You would see that each number is divisible by 22}\\\\\text{All the numbers can be divided by 22, any number bigger wouldn't}\\\text{work}\\\\\text{Therefore, your answer is 22}[/tex]
