Is there a way to add a table to another table?

Ex: I am trying to add something in table1 to table2 then print the results In lines 30, 42,48 are where I use this example it adds xpLvlTable to the table that is stored in 'DataStore'

-- Variables
local xp_lvlDataStore = game:GetService('DataStoreService'):GetDataStore('xp/lvlStore')
local repStorage = game:GetService('ReplicatedStorage')
local xpChanger = repStorage:WaitForChild('Xp_LvlChanged')
local xpToAdd = 5
local part = script.Parent
local maxLvl = 350

-- Events
pcall(part.ClickDetector.MouseClick:Connect(function(plr)
	-- Defines xp and lvl
	local key = 'Player-'..plr.userId
	local xpLvlTable = xp_lvlDataStore:GetAsync(key)
	local curXp = xpLvlTable[1]
	local curLvl = xpLvlTable[2]
	print('serverCurXp = '..curXp)
	print('serverCurLvl = '..curLvl)
	-- Fire to player
	xpChanger:FireClient(plr,xpToAdd)
	-- Math
	local newLvl = curLvl + 1
	local newXp = curXp + xpToAdd
	local lvlEquation = 10*curLvl
	print('ServerNewXp = '..newXp)
	-- Adds lvls and sets xp
	if curLvl == 0 and newXp >= 10 then
		print('Saving 1st lvl')
		local new_xpLvlTable = {1,(xpToAdd - 10)}
		wait(6)
		xp_lvlDataStore:IncrementAsync(key,(new_xpLvlTable))
		print('Saved')
	elseif curLvl >= maxLvl then
		print('Saving maxLvl')
		local xpLvlTable = {0,350}
		wait(6)
		xp_lvlDataStore:SetAsync(key,(xpLvlTable))
		print('Saved')
	elseif lvlEquation <= newXp and lvlEquation ~= 0 then
		print('Saving Lvled Up')
		local xpLvlTable = {1,xpToAdd - lvlEquation}
		wait(6)
		xp_lvlDataStore:IncrementAsync(key,(xpLvlTable))
		print('Saved')
	else
		print('Saving Did not lvl up')
		local xpLvlTable = {curLvl,xpToAdd}
		wait(6)
		xp_lvlDataStore:IncrementAsync(key,(1))
		print('Saved')
	end
end))

I meant to use one table and its numbers that are in it to be added to the numbers inside the second table

Yep. Just add the table as you would for any other element.

local table1 = {"apple", "banana", "pommegranate", "idk if that spelling is right"}
local table2 = {1, 3, "hello", table1}

-- same thing as saying

table2 = {1, 3, "hello", {"apple", "banana", "pommegranate", "idk if that spelling is right"}}

-- to get table1 from table2
table1 = table2[4] -- table is the 4th index

-- to get the first element of table 1 from table 2
local firstElement = table2[4][1] --> "apple"

-- alterantively
table1 = table2[4]
firstElement = table1[1] --> "apple"

Hope this helps! :)