#148-(2,4)..#149-(2,4,6)спасибо заранее

Question

#148-(2,4)..#149-(2,4,6)спасибо заранее

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Answer 1

403×13 - 393×13 = 5239 - 5109 = 139
307×68 - 207×68 = 20876 - 14076 = 6800

48×17 - 13×17 + 876 = 816 - 221 + 876 = 1471
75 + 36×421 + 27 + 64×421 = 75 + 15156 + 27 + 26944 = 15231 + 26971 = 42202
26×39 + 421 + 74×39 - 241 = 1014 + 421 + 2886 + 241 = 1435 + 2645 = 4080