#include <math.h>
double test3 (double a, double b, double c)
{
return - (a + b * c);
}
double test4 (double a, double b, double c)
{
return - (-a + b * c);
}
double test5 (double a)
{
return 1/a;
}
double test6 (double a)
{
return 1/sqrt(a);
}
double a, b, c;
int main()
{
test3(a, b, c);
test4(a, b, c);
test5(a);
test6(a);
}