=9* 1 1 1 1 1*7+ 1 1 1 1*37
= 1 1 1 1 1*63+ 1 1 1 1 1*37
= 1 1 1 1 1*(63+37)
= 1 1 1 1 1* 100
= 1 1 1 1 100
888*9- 1 1 1*22
= 1 1 1*8*9- 1 1 1*22
= 1 1 1*72- 1 1 1*22
= 1 1 1*(72-22)
= 1 1 1*50
=5550