exam Maths Puzzle Numerical Ability

Please help me with this homework question! simplify. A times A to the 7th power divided by A to the 5th power.

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#30 ^1 3x/3+y over 1 = x/1+y 3x and 3 are crossed

#31 ^1 2x + y/x over 1 = 2+y 2x and x are crossed

#32 ^1 2a + b/a+b over 1 = 2 2a + b and a + b are crossed
Solve the problem. Use 3.14 for π.
A figure skater must trace a figure eight on the ice that consists of two perfect circles, each with a radius 11 ft. of How far does the skater go one time around the figure eight?