Preply — $1.2 billion: This language learning platform last raised a $150 million Series D at a $1.2 billion valuation. It has raised more than $320 million in funding to date from investors like Owel Ventures and Full In Partners. It was founded in 2012, according to Pitchbook.
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And that’s concretely testable and verifiable.
return x + (x**3)/6 + (3*x**5)/40 + (5*x**7)/112。关于这个话题，星空体育官网提供了深入分析