exam Maths Puzzle Numerical Ability

simplify (3x+1)^2-(2x+1)(x-5)+2 and factorise the simplified expression!! help please...!!

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The response to my question 153330 is incorrect

The equation is 4topower 3 < 5to power 5=4power8

it does not makes sense....or am i missing something Pat and Chris always walk up the subway escalator while it is running. Pat climbs 20 steps at a constant pace, taking 60 seconds to reach the top, whereas Chris takes only 16 steps