ƚ  0W Q .    &  & MathTypePSymbol qww 0w_fj-2 ~(ySymbolq "ww 0w_fj-2 ~_)yTimes New Romanww 0w_fj-2 O ac2 [ab2 cb2 qbb2 :abSymbolq #ww 0w_fj-2 )+b2 #=b2 +b & "Systemj_fj !-