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It's my first time using html and javascript

As a reward, here is a random cat picture:

And a catgirl pictures as well:

LATEX testing area below

When \(a \ne 0\), there are two solutions to \(ax^2 + bx + c = 0\) and they are \[x = {-b \pm \sqrt{b^2-4ac} \over 2a}.\]