（3/10）*（185*9/10^2）
    1^2+2^2+3^2+4^2+5^2+6^2+7^2+8^2+9^2+10^2
    (0.084081+0.163516+0.01897)/6
    (0.084081+0.163516+0.01897)/5
    (0.084081+0.163516+0.01897)/6
    ((312.68-309.44+2.63)/309.44)
    ((321.05-275.76+0.95)/275.76)+((309.44-312.05+1.31)/312.05)
    (((283.48-256.03+0.86)/256.03)+((275.76-283.48+0.21)/283.48)
    (283.48-256.03+0.86)/256.03
    0.32×(18.7×3.9+19×5.3+9.4×1.4+10.1×3.1+20)+10×4.5
    0.32×(18.7×3.9+19×5.3+9.4×1.4+20)+10×1.4
    0.283×(18.7×3.9+19×5.3+9.4×1.4+10.1×3.1+10.7×6.2+20)+10×10.7
    0.283×(18.7×3.9+19×5.3+9.4×1.4+10.1×3.1+20)+10×4.5
    3.537×(10.1×2.7+10.7×6.2)+10×8.9=
    3.537×2.7×10.1+10×2.7=
    2+3=
    cos1.10125
    cos0.845
    sin1.69
    sin1.48719

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