Can someone please solve these and explain how to do it. I'll give the brainliest to the best answer.

Answer:
5) 1/19x^6
6) 14a^3
7) 3/8
8) (3)/4s^3 r^8
Step-by-step explanation:
(-) exponents flip it to the other side of the bar
x^-6 = 1/x^6
With positive exponents, the exponent with the lower power subtracts from the higher power