怎样简便就怎样计算56.73×259﹣56.73×159; (﹣)×11×12;138×1+23.3×(2﹣75%)﹣125%×38+(1+0.25)×28.7; +.
(1–×)÷ [(1–)×]÷4
[(1–)×]÷4++
(–)÷(+)[1–(+)]÷3.5
25÷(–)+–
–(+)×–