1. 9^3*3^4/27^2=3^6*3^4/3^6=3^4=81
2. .... = 3^10*3^7/3^15=3^17/3^15=3^2=9
.3. ... = 7^6*7^10/7^15=7^16/7^15==7
4. ... = 2^2*2^6/2^5=2^8-2^5=2^3=8
5. ...= 3^2*3^6/3^5=3^8/3^5=3^3=27
6. ,,, = 5^8/5^6*2^5=1/32
7. ... = b^8/b^11=1/b^3
8. ... = n^6*n^10/n^12=n^16/n^12=n^4
9. ... = 7^6*7^10/7^15=7^16/7^15=7
10. ... = 3^10*3^7/3^15=3^17/3^15=3^2=9