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    lgx=-13
    lgx=-13
    0=2000*50000-(x+(1000+150)*50000)
    lgx=-0.013
    2x^2+3x-2
    30x∧2+192x-192=0
    X∧2+0.021X-0.00084=0
    x/lnx
    arcsin x+x*sqrt(1-x^2)=4.712
    arcsin x+x*(1-x^2)^0.5=4.712
    3(2x-1)=2-3x
    200*(1+x)²-200*(1+8%)=72
    √(a^2-16)√(64-a^2)+√(256-a^2)√(a^2-4)=120
    √(a^2-16)(64-a^2)+√(256-a^2)(a^2-4)=120
    (y-1)^5+2y+sin(y-1)=1
    (x-1)^5+2x+sin(x-1)=3
    x^3+2x-4=0
    x^3+2x-4=0
    x(x+1)=210
    -1/2*e^(-2x)

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