Distribute the factor of 6 and simplify to obtain $(1+2i)6-3i=6+12i-3i=\boxed{6+9i}$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Evaluate $(1+2i)6-3i$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
6+9i
Evaluate $(1+2i)6-3i$.
test