please solve the allquestion all' solve please explain
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7) 12/100×600 = 72
8) ★ 3y-9 = 3(y-3) ★5m+5n= 5(m+n)
9) 2003²-1997²
= (2003+1997)(2003-1997)
= 4000×6
= 24000
10)★(1.1)²= 1.21 ★15²=225
11)★15/100=0.5 ★12.5/100=0.125
12)
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