def get_functions(self, left_tex, right_tex):
    left = TexMobject(left_tex)
    left.shift((2 * LEFT))
    left.set_color(DISTANCE_COLOR)
    right = TexMobject(right_tex)
    right.shift((2 * RIGHT))
    right.set_color(VELOCITY_COLOR)
    result = VGroup(left, right)
    result.shift(UP)
    return result
def get_functions(self, left_tex, right_tex):
    left = TexMobject(left_tex)
    left.shift((2 * LEFT))
    left.set_color(DISTANCE_COLOR)
    right = TexMobject(right_tex)
    right.shift((2 * RIGHT))
    right.set_color(VELOCITY_COLOR)
    result = VGroup(left, right)
    result.shift(UP)
    return result