Rejected, see remarks in translation

Rejected:

• No random tests

• Outdated version

• Missing useful assertion messages

• Merge Conflict

Rejected due to

• No random tests

• OP long gone

• Sample tests not in-line with other languages

• Description MC

we are very similar!! haha :D
$_ / $PSItem

Approved some time ago

'approved some time ago'

'alr approved some time ago'

'alr approved some time ago'

this ($a * $b) * $c is the same like this $a * $b * $c
($a + $b) + $c = $a + ($b + $c)
and ...
duplicate !!!
this is basic knowladge in math

needs random tests

https://www.codewars.com/kumite/5b132128d66fe93f2b000048?sel=5d6c7b49ac739b0029164030

thanks for catching that, just fixed