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brval= solve( '-((TH)-(TL))*br + ((RH)^2-(RL)^2) = 0','br')
%brval >(RH^2 - RL^2)/(TH - TL)
arval=solve('-(TH)*(RH^2 - RL^2)/(TH - TL)-ar+ k*(RH)^2+Ur = 0','ar')
%arval>=Ur + RH^2*k - (TH*(RH^2 - RL^2))/(TH - TL)
bmval=solve('k*((TH)^2-(TL)^2)*bm-k*((TH)^2-(TL)^2)+k*((TH)-(TL))+k*((MH)^2-(ML)^2) =0','bm')
%bmval >-(MH^2 - ML^2 - TH^2 + TH + TL^2 - TL)/(TH^2 - TL^2)
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