Not sure what "10 2" means, but if it's 10^2, then
4{3-7}2 + 10^2
4{-4}2 + 10^2
4{-4}2 + 100
-16*2 + 100
-32 + 100
68
if 4{3-7}2 + 10 2 means
4{3-7}^2 + 10*2 then
4{-4}^2 + 10*2
4*16 + 10*2
64 + 20
84
So pick the operator of your choice remembering that
(a) a space is not an operator
(b) elements bumped up against each other are assumed to be multiplied
and then apply the order of PEMDAS
simplify by using the order of operations. 4{3-7}2 + 10 2
2 answers
3•10(9+1)square root of 2