3.14*【7*7-4*4】/2
    3.14*【10*10-8*8】
    3.14*14
    3.14*【8*8-5*5】
    3.14*【10*10-6*6】
    π*(12²-10²)
    -（-0.25）
    （28.77-3.97）/28.77
    14*10.971*4.83+14*11.075*4.83+14*9.839*4.83+14*6.6*4.83+8*11.08*4.83+16*1.98*4.83+16*2.3*4.98
    14*10.971*4.83+14*11.075*4.83+14*9.389*4.83+14*6.6*4.83+8*11.08*4.83+16*1.98*4.83+16*2.3*4.98
    10*12.311*0.888+10*11.196*0.88856*4.369*0.888+28*4.921*0.888+126*5.282*0.888+63*5.834*0.888
    15*10.771*4.83+15*11.572*4.83+15*9.839*4.83+45*6.5*4.83+10*11.497*4.83+20*2.121*4.83+20*2.583*4.83
    10*11.456*0.888+10*10.648*0.888+130*5.214*0.888+30*4.374*0.888+65*5.766*0.888+16*4.926*0.888
    15*10.393*4.83+15*10.174*4.83+15*9.507*4.83+15*6.5*4.83+20*4.1*4.83
    10*11.306*0.888+10*10.498*0.888+130*5.086*0.888+32*4.246*0.888+65*5.595*0.888+16*4.755*0.888
    15*10.393*4.83+15*10.174*4.83+15*9.507*4.83+15*6.5*4.83+4*4.1*4.83+20*4.1*4.83
    15*10.393*4.83+15*10.174*4.83+15*9.507*4.83+15*6.5*4.83+4*-4.1*4.83+20*4.1*4.83
    (2,5)
    14*10.69*0.888+174*4.1*0.888+87*4.696*0.888+42*1.041*0.888+21*1.245*0.888+116*1.2*1.58
    13*12.848*4.83+16*3.528*4.83+6*11.443*4.83+3*11.968*4.83+13*10.864*4.83

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