Question 696531

{{{nPr=n!/(n-r)!}}}


{{{nPr=8!/(8-2)!}}}


{{{nPr=8!/6!}}}


{{{nPr=(8*7*6*5*4*3*2*1)/(6*5*4*3*2*1)}}}


{{{nPr=(8*7*cross(6)*cross(5)*cross(4)*cross(3)*cross(2)*cross(1))/(cross(6)*cross(5)*cross(4)*cross(3)*cross(2)*cross(1))}}}


{{{nPr=8*7}}}

{{{nPr=56}}}