f = x^2 pretty_print(html(r"$\displaystyle\frac{dx}{dt} = %s$" % latex(f)))
dtdx=x2
None
html(r"$$\displaystyle\frac{dx}{dt} = %s$$" % latex(f))
dtdx=x2
# no output None
pretty_print('')
f = x^2 pretty_print(html(r"$\displaystyle\frac{dx}{dt} = %s$" % latex(f)))
html(r"$$\displaystyle\frac{dx}{dt} = %s$$" % latex(f))
# no output None
pretty_print('')