a) 15×(3/5-2/3)+1b)1-13/9:8/19+(-11/9):8/19c)-5/7×2/11+(-5/7)×9/11+1 5/7 2 d)6/7+5/8:5-3/16 ×(-2)e)2×3×4-2×3×4×9+2×3×4×11-2×3×4×13/5×6×7-5×6×7×9+5×6×7×11-5×6×7×13
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