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Ответ:

6+67=73

1243/45=27

73*27=1971

1243÷45*(6+67)=2015.55555556.
1 . 6 + 67 = 73

2. 1243 ÷ 45 = 27.6222222222

3. 27.6222222222 * 73 = 2015.55555556