ƚ` N 1 .  `& & MathTypePSymbol [؟ww wf-2 )(ySymbol ؟ww wf-2 )ySymbol \؟ww wf-2 (ySymbol ؟ww wf-2  )yTimes New Roman؟ww wf-2 1y2 4y2  3y2 * 2y2 }3y2 2y Times New Roman؟ww wf-2 u 2ySymbol ^؟ww wf-2 -y2 =y2  -y2 | =y2  -y2 y-y2 Q=y2 -yTimes New Roman؟ww wf-2 Lgy & "Systemf !-