Hi, i'm trying to see what I missed on these questions, I got these wrongs so I need to compare to my answers, thank you!

#1. How do I find the second derivative of (x³+5)⁵

#2. Also, it says differentiate and simplify this, (x-1)(x²+x+1)/x³

#3. It says differentiate and simplify x²+x-2/ x³+6

#4. It says differentiate and simplify x³-x²-3/x⁵+3

#5. It says solve for x, 5+e^x+1=20

#6. It says differentiate and simplify, ln e^{6x^4}