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    10000+0.9801x^2-198x-0.027x=0
    840*((1-(1+i)^(-60))/i)+940*((1-(1+i)^(-60))/i)*(1+i)^(-60)+1040*((1-(1+i)^(-60))/i)*(1+i)^(-120)=104000
    180833-152.507*(1100+273.15)+8.314*(1100+273.15)ln(([(100/x)-1]^1)*0.01^1 )= 0
    (2-x)^(2)(1-x)=0
    180833-152.507*(1100+273.15)+8.314*(1100+273.15)ln(([(100/x)-1]^1)*0.1^1 )= 0
    X+X*0.03=768
    180833-152.507*(1100+273.15)+8.314*(1100+273.15)ln(([(100/x)-1]^1)*1^1 )= 0
    180833-152.507*(1000+273.15)+8.314*(1000+273.15)ln(([(100/x)-1]^1)*1^1 )= 0
    180833-152.507*(1000+273.15)+8.314*(1000+273.15)ln(([(100/x)-1]^1)*0.1^1 )= 0
    180833-152.507*(1000+273.15)+8.314*(1000+273.15)ln(([(100/x)-1]^1)*0.01^1 )= 0
    50/3.14=120/(1.675+1.675*(1+12x)^(-1/2))^(-1/2)
    180833-152.507*(900+273.15)+8.314*(900+273.15)ln(([(100/x)-1]^1)*0.01^1 )= 0
    180833-152.507*(900+273.15)+8.314*(900+273.15)ln(([(100/x)-1]^1)*0.1^1 )= 0
    180833-152.507*(900+273.15)+8.314*(900+273.15)ln(([(100/x)-1]^1)*1^1 )= 0
    t^(2)-208t+132=0
    2x^2-7x-4=0
    180833-152.507*(800+273.15)+8.314*(800+273.15)ln(([(100/x)-1]^1)*1^1 )= 0
    50=120*x
    180833-152.507*(800+273.15)+8.314*(800+273.15)ln(([(100/x)-1]^1)*0.1^1 )= 0
    180833-152.507*(800+273.15)+8.314*(800+273.15)ln(([(100/x)-1]^1)*0.01^1 )= 0

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