Are You Sure About That?

Now, make sure you understand order-of-operations and negatives before going into this. Or don't. You do you, I guess.

$2 \times (20 + 4 \times 3) - 12 + -20 ÷ 4 \times (-18 \times 2 + \sqrt{1000000}) \times (83 + (13 - 64) + 20)$

Note: I did use a calculator to solve this, I'm a stupid novice and unconfident in my abilities. I'm sorry.