Question

Simpify [{(5/7)^2}^-1]^-3

Answer 1

[[(5/7)^2]^-1]^-3
=(25/49)^-1=(49/25)^3
=91125/15625
=5.83

Answer 2

${ ({ ({ \frac{5}{7}) }^{2} )}^{ - 1}) }^{ - 3} \\ \\ {( ({ \frac{25}{49}) }^{ - 1} )}^{ - 3} \\ \\ {( \frac{49}{25} )}^{ - 3} \\ \\ {( \frac{25}{49}) }^{3} \\ \\ \frac{15625}{117649}$