Chap, this would be close to a load of rubbish, You have repeatly posted extremly similar question for as long as about 2 months this content is explained in kindergarden, I have had the good faith of you being knowledge able of the diffrence's of the pplus and equal to symbol. but relentless I will explain
+ to add like 1+1 = 2 you add numbers together as if like a number line you start at 1 and you count 1 more which would be 2
= means equal to 10 + 7 = 17 they are both equal to one another because 10 + 7 is 17 and 17 = 17.