(π^2×2.06×10^5×1274.3)/(1.1×〖15.84〗^2 )
    625/39.45
    0.305-0.230
    (9.8×10^6)/(0.87×401449×215)
    1.07-〖94.01〗^2/44000
    1884/20.04
    0.5×3768
    (19.1×10^3)/(0.879×1433.3×215)
    (19.1×10^3)/(0.985×1433.3×215)
    660/15.12
    660/41.35
    0.5×1320
    (254×10^3)/(0.997×4851.9×215)+(1.0×12.2×10^6)/(1.15×401449.28×(1-(0.8×254)/467452.94)×215)
    (254×10^3)/(0.997×4851.9×215)+(1.0×12.2×10^6)/(1.15×401449.28×(1-(0.8×254)/467452.94)×215)
    (π^2×2.06×10^5×4851.9)/(1.1×〖4.38〗^2 )
    445/101.70
    atan(0.73)
    sin50
    sin40
    atan(0.35)

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