Номер 401

27 – 3 – 7 = 17;
27 – (3 + 7) = 17;
27 + 3 – 7 = 23;
27 : 3 + 7 = 16;
27 – 3 · 7 = 6;
27 + 3 + 7 = 37;
27 : 3 – 7 = 2.