exam Maths Puzzle Numerical Ability

Need help!!

I need to find four numbers which are divisors of 2 to the 64th power minus 1!!
Thanks.

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(8x (x to the 2 power) + 8x-2)-(8x (x to 2nd power) +5) = 6x+2. Can you explain..pretty new with computer and math. Going back to school. Im stumped..please help Solve the following equations. Construction.A garden area is 30ft long and 20ft wide. A path of uniform width is set around the edge. If the remaining garden is 400ft^2, what is the width of the path?

I am needing some help with this one. Thanks