ƚ` p[  .  `& & MathTypePSymbol/ 0p؟ww w f-2 3(ySymbol@ p؟ww w f-2 c)yTimes New Roman؟ww w f-2 5y2 1y Times New Roman؟ww w f-2 2ySymbol/ 2@؟ww w f-2 =y2 +yTimes New Roman؟ww w f-2 xy & "System f !\-