It equals 4.
When you have an exponent ( a number cubed, squared, so on ) it means times the base number by itself however many times the number of the exponent.
Example:
35
= 3x3x3x3x3
= 243
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2 cubed is equal to 8.
105 squared plus 8 cubed is equal to 11,537.
8 because 2 cubed is 2x2x2=8
Something that is cubed, is a number to the third power. So in this case 8 cubed would be equal to 8x8x8, which is 512.
Two cubed = 2x2x2= 8.