You conquer doubt with practice. Practice of doing it the right way. It takes a unique amount for each person.

but I wanted a human approbation

Here, I would trust any calculator over 10 bobbym's any day of the week and twice on Sunday. Look at what it did:

Now anyone could do it by just following the rule that parentheses and nested ones go first! Wunderbar!

]]>To check your work you can use a calculator or google's calculator. They never make a mistake with the order of operations. If you do not get their answer you know you did not follow the order of operations correctly.

That's what I did, but I wanted a human approbation also ^^ Thank you again ! SOmetimes, I need to have more confidence in what I do. ( I hate when I lack it)

]]>PEMDAS. Parentheses first over exponentiation. In the wrong answer you brought the 14 inside the parentheses. You gave it higher priority, that is the reason for the error.

]]>I did the error of doing this :

Which is clearly false.

I know what is the correct way of doing it, because the real answer is positive one.

But just to know, I should have done BEMDAS to have avoided that incorrect way of doing ? Right ? (It concerned the priority of operations?Just want to be sure I've learned correctly from my error)

Thank you !

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