6-2(3-7)^2÷(-4)=

can you explain how to solve it, please?

6-2(3-7)^2÷(-4)

= 6 - 2(-4)^2 ÷ (-4)
= 6 - 2(16) ÷ (-4)
= 6 - 32÷(-4)
= 6 -(-8)
= 6+8
= 14