((7+1)*9)/3
(7+1)*(9/3)
(7+1)/(3/9)
((7+1)/3)*9
9*((7+1)/3)
(9*(7+1))/3
9*((1+7)/3)
(9*(1+7))/3
9/(3/(7+1))
(9/3)*(7+1)
9/(3/(1+7))
(9/3)*(1+7)
((1+7)*9)/3
(1+7)*(9/3)
(1+7)/(3/9)
((1+7)/3)*9