i need help answering these questions step by step please. i'm very confused especially with 6 and everything after that

Calculate the limits: 1. lim 23 -n+5 12-+00 7/12+3n-B 2/7 2. lim Vn343n2-8n+10 72-900 V7n2+n-9 3. lim In (2n3+5n-8) 72-+00 In(4n11-5n*+10) 4. lim n+5 72-900 In(7n10+5n249) 5. lim 3.2" +5.3+1 12-+00 7:271+1-4.30-1 6. lim (V2n +7 - Van +9) 12-+00 7. lim (V3n + 9 - Van + 15) 12-+00 8. lim (V4n2 + 7n -3 - 2n) 12-+00 12-+00 9. lim (V8n3 + 4n2 + 5n - 8 - V8n3 - n2 + 9n) 10. lim (n+2 \ 72-+00 (n+1) 11. lim 3n1-7 5 7-+00 3n+9 n12+1 12. lim 2n2+n-7 2n 1-+00 2n2-n+9 13. lim Bn+7\ 2+9 12-+00 3n+7 n2+1 14. lim 2n2+5n-9 7n 1-+00 3n2-4n+10