Need help solving and understanding these:

In each of the following situations, indicate whether f=O(g), or f=(g), or both (in which case f=(g) ). (b) n1/2n2/3 (c) 100n+lognn+(logn)2 (d) nlogn10nlog10n (e) log2nlog3n (f) 10lognlog(n2) (g) n1.01nlog2n (h) n2/lognn(logn)2 (i) n0.1(logn)10 (j) (logn)lognn/logn (m) n2n3n (n) 2n2n+1 (o) n!2n (p) (logn)logn2(log2n)2 (q) i=1niknk+1