Add spaces: Beforesuchatransparentandreliablestatisticalsystembecomesfullyfunctional,anyresearchinvolvingChinesedatawillnotbeeasy.

Answer: Before such a transparent and reliable statistical system becomes fully functional, any research involving Chinese data will not be easy.

Add spaces: Toopen,pressthebutton5timeswithinmax.2seconds,theLEDwillblink.

Answer: To open, press the button 5 times within max.2 seconds, the LED will blink.

Add spaces: Firstnotetheinteriorangleofaregularpolygonofnsidesis(π-2π/n).

Answer:
First note the interior angle of a regular polygon of n sides is (π-2π/n).