a) 23 535 : 9 - 546 : 6 + 574 : 14 = 2615 - 91 + 41 = 2565
б) (336 : 21 + 7 ⋅ 14) ⋅ 1255 = (16 + 98) ⋅ 1255 = 114 ⋅ 1255 = 142 070
Ответ: a) 2565; б) 142 070