The simplified SOP (Sum of Product) form of the Boolean expression
(P + `barQ` + `barR` ).(P + `barQ` + R).(P + Q + `barR` ) is
(`barP.Q+barR` )
` `
(`P+barQ.barR` )
(`barP` .Q + R)
(P.Q + R)
how to calculate minimal form of expression..?? is der any shortcut method?