Which expression is a perfect cube? -1,452m^18n^15p^22, -1,331m^18 n^15p^21, 1,331m^18n^15p^22, 1,452m^18n^15p^21

An expression is said to be a perfect cube if the expression is as a result of raising another expression to the power of 3.

An exponent can be expressed as a perfect cube if the exponent is divisible by 3.

Therefore, the expression that is a perfect cube is

Add 6 to both sides and subtract 9b from both sides
you get -76b < 49
divide by -76, which changes the direction of the sign
b> -49/76 but i can’t find the sign for or equal to so its b is greater than it equal to -49/76