Answer:
[tex]\boxed{\bold{621}}[/tex]
Step By Step Explanation:
Follow PEMDAS Order Of Operations
[tex]\bold{12-\left(12-3\cdot \:2\right): \ 6}[/tex]
[tex]\bold{15+100\cdot \:6+6}[/tex]
[tex]\bold{100\cdot \:6: \ 600}[/tex]
[tex]\bold{15+600+6}[/tex]
[tex]\bold{15+600+6: \ 621}[/tex]
[tex]\bold{621}[/tex]
