120/0.8*894-120*844
    120/0.8*894-120/0.9*938
    120/0.9*938-120/0.8*894
    18.9-(5.6+8.9) 8.42+8.46+8.54+8.58 6.7+4.95+3.3 (1.38+1.75)+0.25 4.9+7.2+6.1 44-4.34-2.66 4.6+2.3+5.7+5.4 4.77-(2.77+1.3)
    5.78-(0.16+4.78) 0.9+0.1-0.9-0.1 28.63-0.76-4.63 10.4-3.8-6.2 6.48-（4.48+0.9） 9.85-（3.14+4.85） 3.6+1.1+6.4+8.9 51.7-6.8-3.2
    8.68+4.3+5.7 9.87-0.87-3.59 17.4+18.8+18.6+17.2 6.4+1.98+3.6 6.02+3.6+1.98 3.06-0.18-0.32 1.27+3.9+0.73+16.1 5.52-0.55-0.45
    32.54-0.46-4.54 100-32.17-27.83 98.47+0.52+0.48 0.75+1.39+0.61+2.25 83.68-2.73-0.27 8.9+5.6+6.4+1.1 20-5.6-6.4 6.48-(4.48+0.9)
    3.7+2.8+7.2 6.2+4.5+5.5+3.8 15-0.35-0.65 16.5-7.2-2.8 2.78+0.3+1.7 1.9+2.07+0.93+1.1 20-9.85-7.15 13.64-2.8-3.64
    13.64-2.8-3.64 100-22.35-27.65 14.65+7.4-8.65 5.9+0.1-5.9+0.1 4.02-1.8+1.98 0.37+11.79+0.63 5.78+0.84+0.16 17.4+18.8+18.6+17.2
    32.17-0.45-3.17 42-9.63-1.37+28 8.9+6.4+3.6+1.1 2.78+0.3+1.7 5.2+63.43+0.57 1.9+2.07+0.93+1.1 42+9.63+1.37-28 2.59+3.7+6.3
    5.5+2.76+14.5 50-24.35-22.65 6.7+4.95+3.3 (1.38+1.75)+0.25 6.37-2.5-1.5 61.54-37.67-11.54 17.5-3.56-6.44 120.39-87.62-12.38
    18.5-25.35+26.5 13.7+19.6-9.6 2-1.75-0.25 12.4-2.8-3.4-3.8 15.6-2.8-2.8 0.48+0.25+0.52+1.75 0.12-0.075-0.025 8.5-(1.5+6.8)
    8.07-3.27-0.73-1.07 6.45-(1.68+2.45) 9.15+4.8-9.15-4.8 5.23+10.9-5.23+10.9 2.23-(1.23+0.86) 4.5+8.3-4.5+8.3 6.6-(2.1+3.6) 3.6+0.5-2.1
    10-2.35-4.05-0.65 1.97+4.86+0.03 19.7+4.86+0.3 0.66+7.85+0.15 8.025+3.1+12.175+0.9 9.5-4.6-3.4 4.13-0.6-1.4 4.13-(4.13-1.4)
    (6.125-2.75)-(1.25-0.875) 75-18.3-7.08-9.62 8.59-3.68-3.59 20.5+(20.5-0.67) 93.18-(6.39+3.18) 33.8+17.2-(33.8-17.2) 12.457+5.92-3.457 3.6+3.6+1.4
    （15.28+28.99）+20.72 2.51+3.53+0.49-5.4+1.47 14.27-9.62-4.38 18.3+4.7-2.81-7.19 17.5-3.56-6.44 120.39-87.62-12.38 8.53-2.72-3.28 93.77-(13.77+5.9)
    5.85+1.89+2.15 24.8+14.6+15.4 5.85-1.75-0.25 12.45-1.35-0.65 21.32-（6.32+8.3） 27.3+73.2+72.7 42.5-22.17-7.83 3.8+1.37+6.2+12.63
    （-19/72）+5log(2,5)/64
    arctan63647
    arctan77361

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