Unsolved brackets
Solving brackets does not include forced distribution. Juxtaposition means multiplication, and as such, 2(3+5)² is the same as 2*(3+5)², so once the brackets result in 8, they're solved.
Distribution needs to happen if you want to remove the brackets while there are still multiple terms inside, but it's still a part of the multiplication. You can't do it if there is an exponent, which has higher priority.
Your whole argument hangs on the misinterpretation of textbooks. This is what it feels like to argue against Bible fanatics lmao.
Tell you what, provide me a solver that says 2(3+5)² is 256 and you've won, it's so easy no?