Consider the expression 
This expression contains two terms with
group them:

Now simplify term 
Now 
This expression is defined for all x.
8 or 8 1/2 because you won't finish the ride due to 28 + 3 1/2 being odd
Most of those are correct but the ones that are not are, (15+8 divided by 4-6) as division comes first. 6x3-8 as multiplication comes before subtraction. And 2/3+4x2, multiplication comes before addition. So change those couple up and you got it.
Answer:
1000000000000000000001
Step-by-step explanation:
Done. You're welcome
Please provide more details for me on the comments so I can answer this question. Thanks.