F=(53/4)-2.5/27-65/6).(230+1/25)+46.3/4 PHAN (24/7+3.1/3):(12.1/3-14.2/7) G=(-5/7-7/9+9/11-11/13).(3-3/4) PHAN (10/21+14/27-6/11+22/39):(2-2/3)

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