mission possible
JavaScript
/*
2209 = (a * 7 + 5)² - b + c;
12 = 13 / (7 + a) * b + c;
72 = 11 * a + (b - c)² + a;
*/
var a, b, c, d, e, f;
a = b = c = 6;
d = (Math.pow(a * 7 + 5, 2) - b + c) - 2209;
e = (13 / (7 + a) * b + c) - 12;
f = (11 * a + Math.pow(b - c, 2) + a) - 72;
console.log(d,e,f);