Question

3
What should be added to 5-- to get 12 7 ​

Answer 1

$22 {2 {52 {1213 { \frac{1 {0 \frac{101 {222. \sqrt[04]{?} \times \frac{?}{?} \times \frac{?}{?} }^{?} \times \frac{?}{?} \times \frac{?}{?} }{?} }^{?} }{?} }^{?} }^{?} }^{?} }^{?}$