I have some bad news for you about your education system

It's not the Education system, it's people not remembering what they were taught

Its because its: 2+5×(8−5)

No it isn't. It's 2+5(8−5). Different expression, but in this case co-incidentally the same answer. Preface the first 5 with a Division and you get different answers.

My calculator app

Was written by a programmer who didn't check the rules of Maths first. The only e-calc I've ever seen give the correct answer is MathGPT

not writing it properly

Except it is written properly, as per Maths textbooks

So, brackets: (8-5) is 3

No, it's 5(8-5)=15

Multiplication

There is no Multiplication. Only Addition and Brackets (and Subtraction inside Brackets).

2+5 is 8

In which you just did Addition before Brackets, and is thus wrong

8-5 is 3

5(8-5) is 15

8×3

There is no 8x3. 2+5(8-5)=2+15=17

Brackets have pretty much always been needed

No they aren't. Addition and Subtraction in any order, Multiplication and Division in any order. Only needs brackets if the order matters

because there is no context given

None needed. Obey the rules of Maths and you get the correct answer.

the order of operations or what those operations are exactly would be clear through the context of these formulas

It's clear to anyone who knows the rules of Maths.

Precedences are just made up social constructs

No they're not. They're a natural consequence of the definitions of the operators in the first place.

People: If it ain't broke, then don't fix it

Microsoft: if everyone is happy with it, then break/change it

They keep moving shit around

Yep, this was the one that still annoys me the most (2 menus within the same menu - the usual vertical one, and another, horizontal, one, down after "more options". "Where's the cut option?? .... Oh, it's DOWN THERE now! 🤬")

So you can't be bothered clicking on links, you have to pester people for written responses instead? I've run into your type before, thus I have no tolerance left. Bye then.

Introducing Aspire - Modern app development made easy

Based on the progression of BIDMAS/PEMDAS, addition always is first, followed by subtraction.

Addition and Subtraction in any order actually. The mnemonics are just a way to remember the rules - like a mental checklist - they aren't the rules themselves