,LESSON #B3 ,SYMBOLS = ,ADV.ED ,MA?1 ,"P #B ,ACTIV;Y #B,A3 ,ANSW] ,KEY _% Y .K .,(X, X "K: #0 .,(3, X .1 #0 ,(5X+3Y .K #8 ,( X- Y .K #6 @,(D E F@,) @,(G H I@,) ,\#12 #2 #3 ,\ ,\#4 #6 #5 ,\ ,\#8 #7 -#9,\ _: ,ACTIV;Y #B,B3 ,ANSW] ,KEY _% F(X) .K .,(2X+4 .,(3-X (8%2) (?3/Y+2#)(?2/Y-2#) ,\#4 #0 ,\ ,\#0 -#4,\ _: ,ACTIV;Y #B,C3 ,ANSW] ,KEY _% #1_4 ,C.%,D .K _0 #2_4 ,A.+,B .K .(1, 2, 3, 4, 5.) #3_4 .(5, 7.) _"K: ,D #4_4 ,',IF X @E ,C ,'& X @E ,D, ,'!N X @E ,C.%,D _:4 #B