53+(27-21)= 51+26-34= 57-24+18= 87-(24+22)= 42-(61-38)= 40+45-25= 46+27-33= 42-(26-15)=
    28+50-20= 57+(25-17)= 71-(25+15)= 62-23+8= 56-11+15= 40-(51-23)= 83-(32+24)= 62+27-23=
    28+50-20= 57+(25-17)= 71-(25+15)= 62-23+8= 56-11+15= 20-(51-23)= 83-(32+24)= 62+27-23=
    55+27-33= 53+(26-33)= 59-(24+18)= 89-24+22= 44+61-8= 42-(45-25)= 84-(27+33)= 44+26-15=
    84+20-20= 78+(25-18)= 73-(25+15)= 64-23+8= 58-11+15= 52-(51-23)= 85-(32+24)= 64+27-23=
    84+20-20= 78+(25-18)= 73-(25+15)= 64-23+8= 58-11+15= 22-(51-23)= 85-(32+24)= 64+27-23=
    41+(27-31)= 53+26-36= 59-24+20= 89-(28+24)= 80-(61+10)= 42+45-27= 48+27-35= 44-(26-17)=
    89+(20-29)= 59+25-20= 73-25+17= 64-(23+10)= 58-(11+17)= 22+51-25= 85-32+26= 64-(72-25)=
    55+(29-35)= 53+28-36= 59-26+20= 89-(26+24)= 44-(33-10)= 42+47-27= 48+29-35= 36-(28-17)=
    84+(42-54)= 59+27-20= 73-27+17= 64-(25+10)= 58-(13+17)= 22+53-25= 85-34+26= 64-(29-25)=
    55+(29-35)= 53+28-38= 59-26+22= 89-(62+26)= 44-(53-12)= 42+47-29= 48+29-37= 44-(28-19)=
    84-(54-16)= 59+27-22= 73-27+19= 64-(25+12)= 58-(13+19)= 22+53-27= 85-34+28= 64-(59-27)=
    45+(29-35)= 43+28-38= 49-26+22= 99-(26+26)= 94-(63+12)= 32+47-29= 38+29-37= 34-(28-19)=
    15123+1195×（3.07-3.5）-1/2×20.5×0.39×3.07^2-1/6×20.5×0.39×3.07^3
    74-(24+24)= 49-(27+22)= 63-27+19= 54-25+12= 48-(13+19)= 12+53-27= 75-34+28= 54-(59-27)=
    11.01×12+22.9×10.5+208.45×7.25+191.1×（1.9-3.25）-1/2×18.5×0.66×1.09^2-1/6×18.5×0.66×1.09^3
    11.01×16.51+22.9×15.5+208.45×10.93+191.1×（1.9-3.25）-1/2×18.5×0.66×1.09^2-1/6×18.5×0.66×1.09^3
    11.01×3.93+22.90×6.22+27.62×（1.09-1.5）-1/2×18.5×0.52×1.09^2-1/6×18.5×0.52×1.09^3
    tan（45+8.5）
    0.75-2

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