Mathematica VS Sage
Sagefloat(integral(x*cos(2*x),x,0,1))0.10061200427605527 show(integral(x*cos(2*x),x,0,1)) show(expand((x-3/8)^10)) G = graphs.CubeGraph(5); Gshow(plot3d(G, xres=1280, yres=1024))MathematicaNIntegrate[x Cos[2 x], {x, 0, 1}]0.100612