An integer N is a perfect cube if N can be written as a product of three equal integers. If N = m x m x m. we say N is the cube of m and write N = m³

m³  is read as cube of m or simply m-cube.

For example,

1 = 1 x 1 x 1 = 1³

8 = 2 x 2 x 2 = 2³

27 = 3 x 3 x 3 = 3³

(-4) x (-4) x (-4) = -64 = (-4)³

(-5) x (-5) x (-5) = -125 = (-5)³