USING PEMDAS{Please Excuse My Dear Aunt Sally}
We first write out the equation given
16/4+(5)(6)-{3+(4+1)=
Secondly we deal with whats in the brackets next
which is {3+(4+1)},so basically it will be,
4+1=5
bringing down the 3 to add it to the 5 so it would be 3+5+8
Next we plug it back into whole equation
16/4+(5)(6)-8
again we work out whats in the brackets which is (5) and (6)
we use multiplication
5 x 6= 30
pluging our answer back again into the equation given
16/4+30-8
we then, divide 16 by 4 which is 4
and finally we work out our answer
4+30-8=34-8=26
and your done!