Question 950295
{{{y=x^2/4}}}

{{{dy/dx=x/2}}}
{{{L=int((sqrt(1+(dy/dx)^2)),dx,x=-2,2)}}}
{{{L=(x/4)sqrt(x^2+4)+sinh^(-1)(x/2)+C)}}}
{{{L=2(2/4)sqrt(8)+(sinh^(-1)(1)-sinh^(-1)(-1))}}}
{{{L=2sqrt(2)+2sinh^(-1)(1)}}}
{{{L=2(sqrt(2)+sinh^(1)(1))}}}