Question

Annabelle and Navene are multiplying (4 to the power of 2•7 to the power of 5)(4 to the power of3•7 to the power of 2).

Answer 1

$\bf (4^27^5)(4^37^2)\implies 4^27^54^37^2\\\\\\ 4^24^37^57^2\implies 4^{2+3}7^{5+2}\implies 4^57^7$