43+6﹣25= +﹣=64÷2×4= 27÷(9÷3)=12×7÷12×7= 76﹣24+6=50﹣50÷10= 27÷9×3=1300÷50×0=
21×42+21×63﹣21×5= .
(7.88+6.77+5.66)×(9.31+10.98+10)﹣(7.88+6.77+5.66+10)×(9.31+10.98)= .
10×+17×75%﹣7×0.75.
14﹣(12﹣18)= .
897×﹣37.5%+104×0.375= .