math mode - How to get big curly braces for an equation with 3 parts? - TeX - LaTeX Stack Exchange

I am very new to LaTeX. I want to display this: How should I go about doing this?

Equations - How To Scale Eqnarray To Fit Page Width - TeX - LaTeX Stack Exchange, PDF, Te X

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211 questions with answers in LATEX

211 questions with answers in LATEX

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math mode - How to get big curly braces for an equation with 3 parts? - TeX - LaTeX Stack Exchange

math mode - The curly brace is too big - TeX - LaTeX Stack Exchange

Writing Math Equations in Jupyter Notebook: A Naive Introduction, by Abhay Shukla, Analytics Vidhya

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Equations - How To Scale Eqnarray To Fit Page Width - TeX - LaTeX Stack Exchange, PDF, Te X

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