Test

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Start

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<embedvideo service="youtube">https://www.youtube.com/watch?v=eAORm-8b1Eg</embedvideo> <youtube>https://www.youtube.com/watch?v=eAORm-8b1Eg</youtube>

<score>\relative c { \time 4/4 \key c \major c4 g8 g a4 g r b^> c^> r \bar "|." } \addlyrics { Shave and a hair -- cut: two bits. }</score>

$\surd 4={\frac {2}{4}}$