A bit of Lua golf

-- original
x=tonumber(io.read())or 2 y=tonumber(io.read())or 2 if y^(x%5)+x*y+y~=x^3-(x-120)*x then while 1 do end end

-- golfing...
n=tonumber x=n(io.read())or 2 y=n(io.read())or 2 if y^(x%5)+x*y+y~=x^3-(x-120)*x then while 1 do end end

n=tonumber x=n(io.read())or 2 y=n(io.read())or 2 if y^(x%5)+x*y+y~=x^3-(x-120)*x then while""do end end

n=tonumber r=io.read x=n(r())or 2 y=n(r())or 2 if y^(x%5)+x*y+y~=x^3-(x-120)*x then while""do end end

n=tonumber r=io.read x=n(r())or 2 y=n(r())or 2 if y^(x%5)+x*y+y~=x^3-x*(x-120)then while""do end end

-- The Lua 5.3 parser (as seen on try-it-online) doesn't always need a space between numbers and the next
-- token. (If the following letter is a hex digit, it won't work.)
-- I think this also works in Lua 5.2, but not Lua 5.1.

n=tonumber r=io.read x=n(r())or 2y=n(r())or 2if y^(x%5)+x*y+y~=x^3-x*(x-120)then while""do end end

n=tonumber r=io.read x=n(r())or 2y=n(r())or 2while y^(x%5)+x*y+y~=x^3-x*(x-120)do end

-- Using ... is often the golfiest way to get input, but it reads arguments rather than stdin
-- ie, not strictly equivalent

x,y=...n=tonumber x=n(x)or 2y=n(y)or 2while y^(x%5)+x*y+y~=x^3-x*(x-120)do end

x,y=...n=tonumber x=n(x)or 2y=n(y)or 2while y^(x%5)+y~=x^3-x*(x-120+y)do end

x,y=...n=tonumber x=n(x)or 2y=n(y)or 2while(x-120+y)*x+y~=x^3-y^(x%5)do end