a^17 x b^14 where ^ means "raised to the power of.."
A cube is a product in which a number is a factor three times. An example: 3 x 3 x 3 = 27
This expression would be 3x-7.
Three and eight times a number.
2 x 2 x 2 x 2 x n = 8n
The base is the repeated factor. The exponent tells how many times the base is repeated.
3 x 8
As an expression it is: 3x+5
That's a cube.