tolong dong pake caranya no6,7,9,dan 9

6.(12³: 4³) + ³√9
3³+ 3
=9+3
=12

7). (72-50)pangkat 2+(12+23)pangkat 2=
=>(72-50)(72-50)=484
=>(12+23)(12+23)=1225
=>484+1225=1.709

9). 7/9