2ba^4 (b^5)^-5

Question

2ba^4 (b^5)^-5

Answer 1

The exponent outside the parenthesis is multiplied by the one inside.  

(b⁵)^-5 = b ^5*-5 = b^-25 = 1/b²⁵

2ba⁴b^-25 = 2a⁴b^-24