View Compilation Error

0_0_39721214_21230.cpp: In function 'double f(double)':
0_0_39721214_21230.cpp:5:14: error: 'pow' was not declared in this scope
    5 |     return 6*pow(x,7)+8*pow(x,6)+7*pow(x,3)+5*pow(x,2)-y*x;
      |              ^~~
0_0_39721214_21230.cpp: In function 'double d(double)':
0_0_39721214_21230.cpp:9:15: error: 'pow' was not declared in this scope
    9 |     return 42*pow(x,6)+48*pow(x,5)+21*pow(x,2)+10*x-y;
      |               ^~~