-3l^{2}+20l+100
    60.35^2*600/3.4*(9-2*x)/(9-x)+36*1*(165*2*3.1416*30^2/3.4*x*(60.35/43.85)^2+165*2*3.1416*20^2/3.4*(9-x)*(43.85/60.35)^2)/(75*600/3.4*9/43.85^2/(9-x)+71*165*2*3.1416*30^2/3.4*x^2/43.85^4+71*165*2*3.1416*20^2/3.4*(9-x)^2/60.35^4)=0
    400*180*(5-2*x)/(5-x)+54*(210*900*x*4/9+210*600*(5-x)*9/4)/(75*210*5/900/(5-x)+71*210*900*x*x/30^4+71*210*600*(5-x)*(5-x)/20^4)=0
    400*180*(5-2*x)/(5-x)+54*(180*900*x*4/9+180*600*(5-x)*9/4)/(75*180*5/900/(5-x)+71*180*900*x*x/30^4+71*180*600*(5-x)*(5-x)/20^4)=0
    60.35^2*700/3.4*(20-2*x)/(20-x)+36*0.8*(165*2*3.1416*30^2/3.4*x*(60.35/43.85)^2+165*2*3.1416*30^2/3.4*(20-x)*(43.85/60.35)^2)/(75*700/3.4*9/43.85^2/(20-x)+71*165*2*3.1416*30^2/3.4*x^2/43.85^4+71*165*2*3.1416*20^2/3.4*(20-x)^2/60.35^4)=0
    60.35^2*700/3.4*(9-2*x)/(9-x)+36*0.8*(165*2*3.1416*30^2/3.4*x*(60.35/43.85)^2+165*2*3.1416*30^2/3.4*(9-x)*(43.85/60.35)^2)/(75*700/3.4*9/43.85^2/(9-x)+71*165*2*3.1416*30^2/3.4*x^2/43.85^4+71*165*2*3.1416*20^2/3.4*(9-x)^2/60.35^4)=0
    60.35^2*600/3.4*(9-2*x)/(9-x)+36*0.8*(165*2*3.1416*30^2/3.4*x*(60.35/43.85)^2+165*2*3.1416*30^2/3.4*(9-x)*(43.85/60.35)^2)/(75*600/3.4*9/43.85^2/(9-x)+71*165*2*3.1416*30^2/3.4*x^2/43.85^4+71*165*2*3.1416*20^2/3.4*(9-x)^2/60.35^4)=0
    60.35^2*500/3.4*(9-2*x)/(9-x)+36*0.8*(165*2*3.1416*30^2/3.4*x*(60.35/43.85)^2+165*2*3.1416*30^2/3.4*(9-x)*(43.85/60.35)^2)/(75*500/3.4*9/43.85^2/(9-x)+71*165*2*3.1416*30^2/3.4*x^2/43.85^4+71*165*2*3.1416*20^2/3.4*(9-x)^2/60.35^4)=0
    60.35^2*500/3.4*(9-2*x)/(9-x)+36*1*(165*2*3.1416*30^2/3.4*x*(60.35/43.85)^2+165*2*3.1416*30^2/3.4*(9-x)*(43.85/60.35)^2)/(75*500/3.4*9/43.85^2/(9-x)+71*165*2*3.1416*30^2/3.4*x^2/43.85^4+71*165*2*3.1416*20^2/3.4*(9-x)^2/60.35^4)=0
    60.35^2*450/3.4*(9-2*x)/(9-x)+36*1*(165*2*3.1416*30^2/3.4*x*(60.35/43.85)^2+165*2*3.1416*30^2/3.4*(9-x)*(43.85/60.35)^2)/(75*450/3.4*9/43.85^2/(9-x)+71*165*2*3.1416*30^2/3.4*x^2/43.85^4+71*165*2*3.1416*20^2/3.4*(9-x)^2/60.35^4)=0
    60.35^2*450/3.4*(9-2*x)/(9-x)+36*1*(165*2*3.1416*30^2/3.4*x*(60.35/43.85)^2+165*2*3.1416*30^2/3.4*(9-x)*(43.85/60.35)^2)/(75*450/3.4*9/43.85^2/(9-x)+71*165*2*3.1416*30^2/3.4*x^2/43.85^4+71*165*2*3.1416*20^2/3.4*(9-x)^2/60.35^4)
    60.35^2*450/3.4*(9-2*x)/(9-x)+36*0.8*(165*2*3.1416*30^2/3.4*x*(60.35/43.85)^2+165*2*3.1416*30^2/3.4*(9-x)*(43.85/60.35)^2)/(75*450/3.4*9/43.85^2/(9-x)+71*165*2*3.1416*30^2/3.4*x^2/43.85^4+71*165*2*3.1416*20^2/3.4*(9-x)^2/60.35^4)
    60.35^2*700/3.4*(9-2*x)/(9-x)+36*0.8*(165*2*3.1416*30^2/3.4*x*(60.35/43.85)^2+165*2*3.1416*30^2/3.4*(9-x)*(43.85/60.35)^2)/(75*700/3.4*9/43.85^2/(9-x)+71*165*2*3.1416*30^2/3.4*x^2/43.85^4+71*165*2*3.1416*20^2/3.4*(9-x)^2/60.35^4)
    60.35^2*800/3.4*(9-2*x)/(9-x)+36*0.8*(165*2*3.1416*30^2/3.4*x*(60.35/43.85)^2+165*2*3.1416*30^2/3.4*(9-x)*(43.85/60.35)^2)/(75*800/3.4*9/43.85^2/(9-x)+71*165*2*3.1416*30^2/3.4*x^2/43.85^4+71*165*2*3.1416*20^2/3.4*(9-x)^2/60.35^4)
    60.35^2*600/3.4*(9-2*x)/(9-x)+36*0.8*(165*2*3.1416*30^2/3.4*x*(60.35/43.85)^2+165*2*3.1416*30^2/3.4*(9-x)*(43.85/60.35)^2)/(75*600/3.4*9/43.85^2/(9-x)+71*165*2*3.1416*30^2/3.4*x^2/43.85^4+71*165*2*3.1416*20^2/3.4*(9-x)^2/60.35^4)
    60.35^2*500/3.4*(9-2*x)/(9-x)+36*0.8*(165*2*3.1416*30^2/3.4*x*(60.35/43.85)^2+165*2*3.1416*30^2/3.4*(9-x)*(43.85/60.35)^2)/(75*500/3.4*9/43.85^2/(9-x)+71*165*2*3.1416*30^2/3.4*x^2/43.85^4+71*165*2*3.1416*20^2/3.4*(9-x)^2/60.35^4)
    60.35^2*1500/3.4*(9-2*x)/(9-x)+36*0.8*(165*2*3.1416*30^2/3.4*x*(60.35/43.85)^2+165*2*3.1416*30^2/3.4*(9-x)*(43.85/60.35)^2)/(75*1500/3.4*9/43.85^2/(9-x)+71*165*2*3.1416*30^2/3.4*x^2/43.85^4+71*165*2*3.1416*20^2/3.4*(9-x)^2/60.35^4)
    43.85^2*500/3.4*(9-2*x)/(9-x)+36*1*(165*2*3.1416*40^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*60^2/4/3.4*(9-x)*(60.35/43.85)^2)/(75*500/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*40^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*60^2/4/3.4*(9-x)^2/43.85^4)
    43.85^2*500/3.4*(9-2*x)/(9-x)+36*0.8*(165*2*3.1416*40^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*60^2/4/3.4*(9-x)*(60.35/43.85)^2)/(75*500/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*40^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*60^2/4/3.4*(9-x)^2/43.85^4)
    43.85^2*500/3.4*(9-2*x)/(9-x)+36*0*(165*2*3.1416*40^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*60^2/4/3.4*(9-x)*(60.35/43.85)^2)/(75*500/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*40^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*60^2/4/3.4*(9-x)^2/43.85^4)

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