from spb import plotgrid
expr = Ne(x*y, 1)
p1 = plot_implicit(
    expr, (x, -10, 10), (y, -10, 10),
    grid=False, aspect="equal", show=False,
    title="$%s$ : First approach" % latex(expr))
p2 = plot_implicit(
    x < 20, (x, -10, 10), (y, -10, 10),
    show=False, grid=False, aspect="equal",
    title="$%s$ : Second approach" % latex(expr))
p3 = plot_implicit(
    Eq(*expr.args), (x, -10, 10), (y, -10, 10),
    color="w", show_in_legend=False, show=False)
plotgrid(p1, (p2 + p3), nc=2)  # doctest: +SKIP