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    (135+30x)/(6+5x)
    -15.058x²+14.950112x+4.5793112=0
    m^2+3m-9=0
    —sqrtx3x-1+5
    x^2-1
    (1+x)^46=445.3
    (1+x)^46=4453
    -15x=-25
    15x=-25
    3x+7=10
    2x-x
    2(5/x-3)
    cosx*cosx/sinx=-ln9.6
    (5t-3t×t)×(48-127t+39t×t)=24
    x* sqrt(1/2x)=6
    x+x^2
    7.32+x+(0.61+0.5x/12)*0.487*12=21
    x^4-8x^3-36x^2-34x+50=0
    94.17=3.5/(1+r)+3.5/(1+r)^2+3.5/(1+r)^3+3.5/(1+r)^4+3.5/(1+r)^5+3.5/(1+r)^6+3.5/(1+r)^7+3.5/(1+r)^8+3.5/(1+r)^9+3.5/(1+r)^10+3.5/(1+r)^11+3.5/(1+r)^12+3.5/(1+r)^13+3.5/(1+r)^14+3.5/(1+r)^15+3.5/(1+r)^16
    94.17=3.5/(1+r)

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