hello guys i am in 3th years of studying in uni,i am toke this example as a heading of my project and need answers for it with all thanks, i am software eng

first part: O(g(n)) for this:

(n + 3 )(n + n2+ 4)
5logn+3n+1000
Logn+ 100 +1/ n2
100n2+ ½ n3 +5
(3n2 + 4)3



second part : number of operation of this

1)
if (condition)
{ cout<<”Hello”<<endl; }
else
{
for (i = 0; i < N; i++) {
cout<<”Hi”<<endl;
}
}



2)for (i = 0; i < N; i++) {
for (j = i+1; j < N; j++) {
sequence of statements
}
}



3)for (i = 0; i < 2*N; i++) {
sequence of statements
}
for (j = 0; j < M-1; j++) {
sequence of statements
}



4)
void fun(int k)
{
for (i = 0; i < N; i++) {
sequence of statements
}
}
void main(){
//declaration statements
for (i = 0; i < N; i++) {
fun(i);
}
}