Write each of the following mathematical sentences into ex potential expression.
1. 4x4x4 x 4x4x4x4
expression
12. 7x7x7x7x7x7
3.989x9x9x9xaxaxa
4. 10440x 10x10x10x10x10x10x10x10
5-15x 15 x 15 x15x15x 15x 15x15x15 x 15 x 15​