Could someone walk me through this and explain why each one is true or false?

Select all the statements below which are TRUE: nlgn + n^2 - 10n = theta (nlgn) n^2 + 10n + 2^n + 5 = o (n^3) 256 + squareroot n = theta(1) n^2 + 2^n - 100 = Ohm (n^2) n^4 + n^2 squareroot n + lg n = O (n^4) n^3 - n + 100 squareroot n = omega (n)