ƚ T  .  &D & MathTypePSymbol ww 0wZfy-2 5(ySymbolB ww 0wZfy-2 )y Times New Romanww 0wZfy-2 E3y2 T,5y2 T0y2 TK2yTimes New Romanww 0wZfy-2 3yTimes New Romanww 0wZfy-2 pzy2 yy2 |xySymbolB ww 0wZfy-2 -y & "SystemyZfy !-