(sinx)^3+tanx-5x^5+6+cosx+x^7
    (sinx)^3+tanx-5x^5+6
    sinx/x^2+63x^5-41x+x^3-63
    sinx/x^2+63x^5-41x+x^3-63
    sinx/x^2+63x^5-41x+x^3-63
    45x^11-6x-36
    45x^11-6x-36
    sinx+x^2-4x-365
    12*sin(x)*sin(x)=1+3*sin(2*x)
    sinx+x^2-4x+14
    3x＾2+14x+2=0
    20X＋25(200－X)＋15(220－X)＋22(80＋X)＝10200
    （x-593.75）^2=（x-582.45）（x-604）
    （1-x^339）÷（1-x^338）=94.473÷94.418
    0.01*x^8+100.0001*x^6+x^4-160000x^2-160000
    ((1+1.75)^2-1.56^2)^(1/2)+((x+1.75)^2-x^2)^(1/2)=(7^2-1.56^2)^(1/2)
    ((1+1.25)^2-1.56^2)^(1/2)+((x+1.25)^2-x^2)^(1/2)=(7^2-1.56^2)^(1/2)
    ((1+1.5)^2-1.56^2)^(1/2)+((x+1.5)^2-x^2)^(1/2)=(7^2-1.56^2)^(1/2)
    x^2=0.09*(x-0.01)
    -s^3+2s^2+8s+8＝0

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