12.(C) Printing the value of f(x)=x^4+5*x-3 if x is taken as input

 #include <stdio.h>

#include <math.h>

int main()

{

    int x, k;

    printf("Enter the value of x\n");

    scanf("%d", &x);

    k = pow(x, 4) + 5 * x - 3;

    printf("The value of f(x) = %d", k);

    return 0;

}