error before numeric constant location

[dshfbhsdgz1]

this is my code in c++ and its very simpile but wont compile

#include <iostream>

using namespace std;

int main()
{

    cout << "Here is some text \n";
    cout << "Here is a number: ";
    cout <<  10 ;
    cout <<  endl;
    
    cout << "How much is 15 + 17 the answer is:";
    cout 15 + 17;
    

    cin.get();
    return 0 ;
}

[Banfa]

Line 14 should be

    cout << (15 + 17);