We are given -1-3[4^2-3(-6)]
First step is to calculate potentions:
-1-3[16-3(-6)]
Now if we have to calculate something inside brackets we do if not we do multiplication / division:
-1-3[16+38]
Now we repeat previous step:
-1-3[54]
Now we multiply:
-1-162
Now we substract:
-163