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(12*x^3)/(50-(4*tan(x)))
1;9;0;0;75;0
1000-(25*a)-(5*b);0-(100*a)-(10*b)
100*e^0.5*x = 1.8*(400/(e^-2))*x+0.2;x
x
ln(x) = 1;x
x
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