4541.7*(1.27)=
    4541.7*(1.1)=
    4541.7*(7/6)=
    4541.7*(1+1/6)=
    4996*(1+1/6)=
    4996*(1+10%)*1/6=
    2/3*25.3*(450*sin(3.14*0.0.312)^3+400*400*6842*(sin(3.14*0.626)+sin(3.14*0.312))/3.14
    2/3*25.3*(450*sin(3.14*0.454))^3+335*400*6842*(sin(3.14*0.342)+sin(3.14*0.454))/3.14
    2/3*25.3*(450*sin(3.14*0.454)^3+335*400*6842*(sin(3.14*0.342)+sin(3.14*0.454))/3.14)
    2/3*25.3*(450*sin(3.14*0.454)^3+335*400*6842*(sin(3.14*0.342)+sin(3.14*0.454))/3.14
    2/3*25.3*(450*sin(3.14*0.454)^3+335*400*6842*(sin(3.14*0.342)+sin(3.14*0.454)/3.14
    （500*750+1800*1000)/(500+1800)=
    (9.64/4.82)*169.3*lg(169.3/0.15)
    2/(e(2*3.1415926*1.715/4.614)+e(-2*3.1415926*1.715/4.614))
    (e(2*3.1415926*1.715/4.614)+e(-2*3.1415926*1.715/4.614))/(e(2*3.1415926*1.715/4.614)-e(-2*3.1415926*1.715/4.614))
    e(2*3.1415926*1.715/4.614)
    e(2*3.1415926/1.7154.614)
    3×5/3-2
    3 5/3-2
    417.330939-273.15

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