Áp dụng quy tắc dấu ngoặc, chọn dấu thích hợp.
−57-\dfrac{5}{7}−75 +++ (((43\dfrac{4}{3}34 +37+\dfrac{3}{7}+73))) ===
−57-\dfrac{5}{7}−75
−43-\dfrac{4}{3}−34 +++ (((45\dfrac{4}{5}54 −73-\dfrac{7}{3}−37))) ===
−43-\dfrac{4}{3}−34
76\dfrac{7}{6}67 −-− (((65\dfrac{6}{5}56 +56+\dfrac{5}{6}+65))) ===
76\dfrac{7}{6}67
−57-\dfrac{5}{7}−75 −-− (((43\dfrac{4}{3}34 −37-\dfrac{3}{7}−73))) ===
−43-\dfrac{4}{3}−34 −-− (((−45-\dfrac{4}{5}−54 +73+\dfrac{7}{3}+37))) ===
−43-\dfrac{4}{3}−34 −-− (((−45-\dfrac{4}{5}−54 −73-\dfrac{7}{3}−37))) ===
−43-\dfrac{4}{3}−34 +++ (((45\dfrac{4}{5}54 −73-\dfrac{7}{3}−37 −52-\dfrac{5}{2}−25))) ===
−43-\dfrac{4}{3}−34 -+ 45\dfrac{4}{5}54 -+ 73\dfrac{7}{3}37 +- 52\dfrac{5}{2}25
−43-\dfrac{4}{3}−34 −-− (((45\dfrac{4}{5}54 −73-\dfrac{7}{3}−37 −52-\dfrac{5}{2}−25))) ===
−43-\dfrac{4}{3}−34 +++ 45\dfrac{4}{5}54 −73-\dfrac{7}{3}−37 ===
−43-\dfrac{4}{3}−34 +(+(+(
32 \dfrac{3}{2} 23 − - − 74 \dfrac{7}{4} 47 −52 -\dfrac{5}{2} −25 = = =
32 \dfrac{3}{2} 23 − - − ( ( ( +- 74 \dfrac{7}{4} 47 -+ 52 \dfrac{5}{2} 25 ) ) )
32\dfrac{3}{2}23 −-− 74\dfrac{7}{4}47 +52+\dfrac{5}{2}+25 ===
32\dfrac{3}{2}23 −(-(−(
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