Does Tex("str") have indexes like Tex("str")?

[BlockOG]

I want to color a part of some Tex text and also get the corners of that part but can't because when I try for example this:

class Math(Scene):
    def construct(self):
        math = Tex("1\\frac{5*1}{6*5}")
        math[0:1].set_color(RED)
        math[1:2].set_color(BLUE)
        math[2:3].set_color(YELLOW)

        self.play(Write(math))

The result is this:

How do I fix this? And also how could I get the corners of a specific character or group of character? And how could I remove that specific character or group of character without using transform and making it so there is no space to put something else in there by moving

[BlockOG]

I solved the first question you just have to do this because tex makes an array inside an array:

class Math(Scene):
    def construct(self):
        math = Tex("1\\frac{5*1}{6*5}")
        math[0][0].set_color(RED)

        self.play(Write(math))

Result:

[BlockOG]

Actually the LEFT RIGHT and all those are quite funky on tex
Sometimes UP and DOWN get swapped sometimes RIGHT and LEFT get swapped I just don't understand this and also that only happens with the line ): don't understand what the heck is going on here

[BlockOG]

But removing it doesn't work :( it removes it's color and that's really strange it actually does remove it :D

[BlockOG]

I solved my own question but it would probably be a good idea to fix this either way