local stuff = "sin(x)" for i=3,3*200,2 do stuff = stuff..'+(sin('..i..'*x)/'..i..')' end print(stuff) --lua function same usage as math.sin and math.cos function math.sqr(x,res) res = res or 20 local val = math.sin(x) for i=3,3*res,2 do val = val +(math.sin(i*x)/i) end return val end for i=1,100 do print(math.sqr(i/5)) end