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from:1985 till:end shift:($dx,10) text:Mikhail~[[Gorbachev]] | from:1985 till:end shift:($dx,10) text:Mikhail~[[Gorbachev]] | ||
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<math> | |||
The quadratic formula is $$-b \pm \sqrt{b^2 - 4ac} \over 2a$$ \bye | |||
</math> | |||