6.7+13.43+15.75
    388.3-69.53+8.93
    388.3-69.53+8.93
    √((9.09×238)/(1000×1.12))+0.3
    √((9.09×238)/(1000×1.12))
    0.0347×77×〖9.2〗^2
    0.0508×77×〖7.8〗^2
    2×26+1×25
    √((9.09×237)/(1000×1.12))
    0.0508×77×〖7.8〗^2
    √((9.09×200)/(1000×1.12))
    √((9.09×200)/(1000×1.05))
    0.0347×65×〖9.2〗^2
    0.0508×65×〖7.8〗^2
    （4500000-1500000）*2.5%*2
    （4500000-1500000）*2.5%*2-8000
    -588.74/640.67
    -558.74/640.67
    2.756/100000*(101.33*0.0084-0.8512)
    240*2+220+185+180*2+155+140*3+120*2+100*2+90+85+80+70+60*8+45*3+35+70=

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