Remove the brackets and write an equivalent expression.
 
(a) 51 \(-(\)24 \(-\) 7\()\) \(=\)
 
(b) \((\)7 \(+\) 4\()\) \(\times\) 13 \(=\)
 
(c) \((\)84 \(\div 3) + (\)10 \(-\) 4\()\) \(=\)