The value of -7 ÷ [5 + 1 ÷ 2 - {4 + (4 of 2 ÷ 4) + (4 ÷ 4 of 2)}] is:

Solution (By Examveda Team)

$$\eqalign{ & - 7 \div \left[ {5 + 1 \div 2 - \left\{ {4 + \left( {4{\text{ of }}2 \div 4} \right) + \left( {4 \div 4{\text{ of }}2} \right)} \right\}} \right] \cr & = - 7 \div \left[ {5 + \frac{1}{2} - \left\{ {4 + 2 + \frac{1}{2}} \right\}} \right] \cr & = - 7 \div \left[ {5\frac{1}{2} - 6\frac{1}{2}} \right] \cr & = - 7 \div \left( { - 1} \right) \cr & = 7 \cr} $$