WPS Office for Linux
WPS Office for Linux is currently a non-oss product from Kingsoft Corp, which is a company mostly focused on office suites, and began R&D for its Linux version back to 2003. Unlike LibreOffice or Oracle OpenOffice, it's almost a "clone" of M$ Office. So it is the most powerful drop-in replacement for M$ Office in Linux nowadays, unless you want to use some M$ only technique like VBA for Excel.
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