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single dollar: $inline(math)$ $linebreak \ linebreak$ $doublebreak \ doublebreak$

double dollar: \(inline(math)\) \(linebreak \ linebreak\) \[doublebreak \\ doublebreak\]

math with double dollars: \( multi-line(math) \)

paren

math with \\(: \( \begin{bmatrix} foo & bar & baz \\ qwer & poiu & moo \end{bmatrix} \)

bracket

math with \\[: \[ \begin{bmatrix} foo & bar & baz \\ qwer & poiu & moo \end{bmatrix} \]

Becky has $20, and Clarence has $40. How much money will Becky have if Clarence gives her $10?

Becky has $20, and Clarence has $40. How much money will Becky have if Clarence gives her $10?