how can i whiten teeth fast?

I am 16 and I have yellowish teeth and I am wondering how can I whiteness them faster. It is from not brushing them when I was a kid. But I have been brushing them regular for a while and there still yellow.. is there any good products I can spend about $150 or home remedies or something
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Home remedies don't really work well. They have that ZOOM whitening thing at certain dentists. It is about $299. Check it out.
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