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- create code fences with backticks ` or tildes ~ ```
like so
``` - add language identifier to highlight code ```python
def function(foo):
print(foo)
``` - put returns between paragraphs
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`like _so_` - quote by placing > at start of line
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\$\sin^2 \theta\$
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ArrayPlot@CellularAutomaton[90, {{1}, 0}, 31]orMatrixPlot@CellularAutomaton[90, {{1}, 0}, 31]. \$\endgroup\$ReliefPlot@... \$\endgroup\$