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已知：2＋＝22×，3＋＝32×，4＋＝42×，5＋＝52×，若10＋＝102×符合前面式子的规律，则b﹣a＝ .
＝22×
＝32×
＝42×
＝52×
＝102×
＝22×
＝32×
＝42×
＝52×
＝102×
＝22×
＝32×
＝42×
＝52×
＝102×
=22×
，3+
=32×
，4+
=42×
，5+
=52×
，…，若10+
=102×
符合前面式子的规律，则a+b= ．