exam Maths Puzzle Numerical Ability

Write ((81^x+1)(1/9^4-x)) / 27(243)(^x-2) as a single power.

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CAN SOMEONE PLEASE HELP ME WITH THIS PROBLEM:
Consider d(x)=(x+2)^3+3; what is the new equation for d(x) if it is 4 times larger?

a. d(x)=4(x+2)^3 +12
b. d(x)=(x+2)^12 + 3
c. d(x)= 4(x+2)^3
d. d(x)=4(x+2)^3 +3 if a line is horizontal,its slope is 1,0,underfined,negative