= 10^(3+4)

= 10^7

(a 4) 4 Power of 4, exponential multiplication of constant base.

=a^(4×4)

=a^ 16

(2b)？ To multiply products, multiply each factor first, and then multiply the result.

=2? ×b？

=8b？

(a-b)? × (A-B )× (A-B)?

=(a-b)^(2+ 1+3)

=(a-b)^6