ƚ` Q  .  `&`& & MathType`-rrTimes New Roman؟ww w f-2 lxy2 xy2 `xy2 `xySymbol ״؟ww w f-2 "=y2 -y2 =y2 -y2 `=y2 `-yTimes New Roman؟ww w f-2 8y2 1y 2 @ 2 8 2 1 2 @ 2 `122 `122 `:42 & "Systemɓ f !-