Use ratsimp(dy) and you'll recover your original expression. (%i6) ratsimp(dy); (%o6) x^3*sqrt(1-x^2)
Move 'cartan' documentation from Differentiation.texi to cartan.texi
Move 'cartan' documentation from Differentiation.texi to cartan.texi
Move 'cartan' documentation from Differentiation.texi to cartan.texi
laplace (delta (t - a) * sin(b*t), t, s) gives zero
update to 'apply' documentation ...
restructure 'format' package table info
Create texinfo documentation for package 'format'