(1) (30 + 312 ÷ 241) 12
First, solve the division inside the parentheses: 312 ÷ 241 = 1.293
Now, add 30 + 1.293 = 31.293
Multiply by 12: 31.293 12 = 375.516

(2) (10 6 6 6) - 6218 - (3992 - 909) 37 103
First, solve the multiplication inside the parentheses: 10 6 6 6 = 2160
Next, solve the subtraction inside the second set of parentheses: 3992 - 909 = 3083
Now, solve the multiplication: 3083 37 103 = 11906653
Now, subtract 6218 from 2160: 2160 - 6218 = -4058
Finally, subtract the result from the previous step: -4058 - 11906653 = -11910711

Therefore, the final answer is:
(1) 375.516
(2) -11910711