√((35.52/1.22)^2+〖26.78〗^2 )
    (60.0×1000)/(7×320)
    70.863+20+600/2-35=
    (109.4×1000)/(7×440)
    √((29.02/1.22)^2+〖55.13〗^2 )
    (123.5×1000)/(7×320)
    √((29.02/1.22)^2+〖38.75〗^2 )
    (86.8×1000)/(7×320)
    (89.4×1000)/(7×440)
    1+1/211.002×5.5^2×1
    1300×(59.644×1000/831.802+20)/565=
    (86800-0.3×89400)/(0.9×0.546×360)
    89400/(0.8×0.76×360)
    123500/(0.9×0.546×360)+89400/(0.8×0.76×360)
    1109.612×1000×340-14.3×600×129.325×(565-0.5×129.325)=
    (90600-0.3×60100)/(0.9×0.742×360)
    60000/(0.8×0.85×360)
    0.045*398*398*1.39939153
    109400/(0.9×0.742×360)+60000/(0.8×0.85×360)
    0.045*398*398*(cos29+0.3*cos58)

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