25.sagews

a = sin(x); y = cos(x^2) + e^(3*pi*x)

html("$$%s \cdot \\frac{d^2}{dt^2}\\left[ %s \\right]$$"%(latex(a), latex(y)))

\sin \left( x \right) \cdot \frac{d^2}{dt^2}\left[ \cos \left( {x}^{2} \right) + {e}^{{{3 \pi} x}} \right]