Debug Program C++ #1 FIX

/*Fix the errors and get an error free compilation and execution.*/

#include<iostream>
#include<fstream>
#include<string>
#include<math.h>
using namespace std;
/*  Udacity Lesson 3: Arithmetic Operations
    Date : 04/07/2019
    No : 14
*/
int main()
{
    ifstream myfile;
    myfile.open ("input.txt");
    int coeff1, coeff2, constant;
    int exp1, exp2;
    int y;
    int x;
    //Calculate the value of y for a user defined three term polynomial
    //Get the coefficients, exponents, and the constants
    std::cout<<"What is the first coefficient?";
    std::cin>>coeff1;
    std::cout<<coeff1<<"\n";
    std::cout<<"What is the exponent of the first term?";
    std::cin>>exp1;
    std::cout<<exp1<<"\n";
    std::cout<<"What is the second coefficient?";
    std::cin>>coeff2;
    std::cout<<coeff2<<"\n";
    std::cout<<"What is the exponent of the second term?";
    std::cin>>exp2;
    std::cout<<exp2<<"n";
    std::cout<<"What is the constant?";
    std::cin>>constant;
    std::cout<<constant<<"\n";
    //Print the complete equation
    std::cout<<"The polynomial we are solving is:\n";
    std::cout<<"coeff1"<<"*x^exp1"<<" + "<<"coeff2"<<"*x^"<<"exp2"<<"+ "<<"constant";
    std::cout<<"\nWhat is the value of x?";
    std::cin>>x;
    std::cout<<x<<"\n";
    //Solve the equation with the given x
    y = coeff1*pow(x,exp1) + coeff2*pow(x,exp2)+constant;
    std::cout<<"y = ("<<coeff1<<"*"<<x<<"^"<<exp1<<") + ("<<coeff2<<"*"<<x<<"^"<<exp2<<") + "<<constant<<" = "<<y;
    return 0;
}