In Exercises $14-16,$ select a theta notation for $f(n)+g(n).$

$f(n)=(1),g(n)=(n^2)$

$f(n)=6n^3+2n^2+4,g(n)=(nlgn)$

$f(n)=(n^{\frac{3}{2}}),g(n)=(n^{\frac{5}{2}})$