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£±³Ñ¡¡ | 7.13(6.12)(3.11)-8(1.9)-2=(4.5)-10 |
£²³Ñ¡¡ | 7(12.13)(6.11)-(3.8)-(1.9)-2=5-(4.10) |
£³³Ñ¡¡ | 7.11(12.8)6-2-13.3(1.9)=5-4.10 |
£´³Ñ¡¡ | 7.11-(12.8)-6.2=13(1.3.9)=5-10-4 |