Вариант 4.
a := 4;b := 8;b := a * b;c := b + a;
a := 2;b := 6;b := a * b;c := 5*a - b;
a := 5;b := -a - 8;
a := -6;b := a + 2*9;
a := 12;a := - a + 10;
a := 3;a := 7 - 3*a;
a := 20;b := 3;b := a mod b;c := a div (b + 1);
a := 22;b := 4;b := a div b + b;c := a mod b + a;