121.142+142.55+20=
    0.7×9.8×（24.25-3.47）=
    0.689×228.52=
    （0.7×19.11+0.65×5.14）/24.25=
    228.52×(tan(45-13.091/2)*tan(45-13.091/2))-2×14.466×tan（45-13.091/2）=
    228.52×(tan(45+13.091/2)*tan(45+13.091/2))+2×14.466×tan（45+13.091/2）=
    228.52×(tan(45+13.091/2)*tan(45+13.091/2))+2×14.466×tan（45+13.091/2）=
    （14×19.11+16.2×5.14）/24.25=
    （12.9×19.11+13.8×5.14）/24.25=
    17.8×3.47+（17.8-9.8）×（19.11-3.47）+（17.9-9.8）×5.14=
    63.187+148.24+20=
    34.658+148.24+20=
    0.7×9.8×（11.63-（-9.98））=
    0.675×93.61=
    （0.7×5.91+0.65×5.72）/11.63=
    93.61×(tan(45+13.343/2)*tan(45+13.343/2))+2×15.082×tan（45+13.343/2）=
    93.61×(tan(45-13.343/2)*tan(45-13.343/2))-2×15.082×tan（45-13.343/2）=
    （14×5.91+16.2×5.72）/11.63=
    （12.9×5.91+13.8×5.72）/11.63=
    （17.8-9.8）×5.91+（17.9-9.8）×5.72=

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