210*150+ 350y = 73500
    210*150 + 350y = 73500
    210*100 + 350y = 73500
    3a^(2)-24a-152=0
    x^2+4*x+16=0
    3x^2+8x+3=0
    14.65x^3+47.88x^2-385.76x-3548.39=0
    210*300 + 350y = 73500
    14.65x^3+42.52x^2-243.42x-2398.93=0
    90-arctan4-arctan0.56-arctan0.28-aectan75.6
    X^3-13X^2+50X-56=0
    14.65x^3+72x^2-245x-2284.07=0
    14.65x^3+81.99x^2-138.92x-1509.74=0
    14.65x^3+91.98x^2-32.84x-920.48=0
    14.65x^3+123.96x^2+91.55x-622.62=0
    90-arctan0.4-arctan0.2
    90-arctan0.56-arctan0.28
    arcsinx=30
    90-arctanw-arctan（w/2）=45
    1/(355.54 )* exp(-(x-2813.94 )^2/(40237.13 ))=1/(1810.06 )* exp(-(x-4747.56 )^2/(1042880.87 ))

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