4y7
214
11x9y124x3y5
2155
121xy3505x03y02
216
4m2
503
4m6
11xy1232171xy233
218
04x03y0711x10y1
19
f12xy10219532x2y7
x2y02203x2y8
2xy32215xy33
3x4y22222xy5
2xy52233x4y2
x2y92243x2y1
3x2y22252x3y6
3x1y5226y1x153
20
f227
3x5z6x4z15
①②
228
m
22m3
14
①②
4xy131y2229xy223
13x7y92304x7y52
13x4y102315x6y422
m
1323232m
334
3xy4xy4233xyxy126
3x2y5　　　　①2342xy8　　　　　②
21
fxy2235343x4y7
①②
xy12364x4y4
x3y2372x5y4
2x3y152382x2y5
5xy72394x3y17
4x3y52402xy2
3x5y92412x3y6
2x2y82422x2y4
2X3Y02433XY11
xy52442x3y150
22
f245
2xy72x5y19
246
x2y213x5y56
247
5x7y525x2y22
248
5x7y657x7y203
249
8x4y56x4y21
250
5x7y415x8y44
251
7x5y543x4y38
23
252
x8y154xy29
f253
3x6y249x5y46
254
9x2y624x3y36
255
9x4y467x4y42
256
9x7y1354xy41
257
3x8y51x6y27
258
9x3y994x7y95
259
9x2y383x6y18
24
260
5x5y457x9y69
f2611
8x2y287x8y62
262
x6y143x3y27
263
7x4y672x8y26
264
5x4y527x6y74
265
7xy94x6y16
266
6x6y486x3y42
267
8x2y167xy11
25
268
4x9y778x6y94
f269
6x8y687x6y66
270
2x2y227x2y47
271
5x3y83x5y8
272
6x7y5x2y4
273
10x8y14xy5
274
4x7y3xy0
275
3xy107xy20
276
44x10y27xy1
26
f277
8xy0xy18
278
11xy1211yx12
279
5x6y272x3y12
280
7x2y4x2y12
281
2xy5y22x5y0
282
7x3y33x2y21
283
7x2y21
27
284
10x8y0
fy6x1
3x2y2
285
3xy105x7y8
286
3x2y1xy3
287、x3y53x4y2
288、y3x2
x2y6
2895x3y22xy3
290、2x3y12r