ƚ @ QP  .  @ &  & MathTypePSymbol$ ww 0w fI-2 (ySymbolc ww 0w fI-2 t )yTimes New Romanww 0w fI-2  4y2 5y2 2y2 N3y Times New Romanww 0w fI-2 2y2 2ySymbol$ ww 0w fI-2  -y2 +y2 :-yTimes New Romanww 0w fI-2 tay2 ay2 ay & "SystemI fI !-