int suma(int,int)

#include<stdio.h>

int suma(int,int);

int iloczyn(int,int);

int kwadrat(int);

int kwadratsumy(int,int);

main()

{int x,y,z;

scanf("%d %d %d",&x,&y,&z);

printf("(%d+%d)*(%d+%d)=%d\n",x,y,x,z, iloczyn(suma(x,y),suma(x,z)));

printf("(%d+%d)^2=%d\n",x,y,kwadratsumy(x,y));

printf("%d*%d=%d\n",x,y, iloczyn(x,y));

printf("%d*%d=%d\n",x,y,

(kwadratsumy(x,y)-kwadratsumy(x,-y))/4);

}

int suma(int a,int b) { return a+b; }

int iloczyn(int a,int b) { return a*b; }

int kwadrat(int a)

{ return iloczyn(a,a); }

int kwadratsumy(int a,int b) {int temp;

temp=suma(a,b);

return kwadrat(temp);

} /*

2 5 6

(2+5)*(2+6)=56 (2+5)^2=49 2*5=10 2*5=10

*/