Question 1029353
{{{matrix(1,4,

int((x^3-6x),dx,0,3),
""="",
matrix(2,1,lim, matrix(1,3,x,"->",infinity) ),
sum( ((3i/n)^3-6(3i/n))*(3/n),matrix(1,3,"","",i=1),matrix(1,4,"","","",n)) 
)}}}