Mathematics
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    x²=4
    (X+800/12)48+X240+(X-800/12)41=272834
    x^3-4*x^2-1
    0.019*x^2 = 2989.657+14.2367*e^(0.00023725*x)
    (x-40)×(1500-20x)=0
    x²+1.6x=1
    0.019*x^2=2989.657+14.2367*e^(0.00004745*x)
    xe^x=-ln(1-x)
    2(x+5)=50+88.2+250-2x
    1+5x=0.87
    100×1.6x+80×1.4(x+5)=1080
    x*x+x=272
    (544+172x)/(841+472x)=0.5
    (544+172x)/(841+472x)=1/2
    315*x+215*x*(4.86-x)=4.86*264
    315*x+215*x*(4.86-x)=4.86*264
    x=sqrt-1
    x^2+4x+5
    x^18+x^10=87
    sqrt(x^4+8x^3+17x^2)=2sqrt5

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