What regular expression can be used to find the text between +?

Question

Regular Expressions

There is a reaction

KMnO4 + HCl = KCl + MnCl2 + Cl2 + H2O

how, using a regular expression, you can get substances from it that stand after the equal sign? (the "+" sign must be removed)

Answer 1

Why is there a regular? Split string on =, split second part on +.
The specific implementation depends on the programming language. For example in PHP:

$str = 'KMnO4 + HCl = KCl + MnCl2 + Cl2 + H2O';
$list = explode('+', explode('=', str_replace(' ', '', $str))[1]);
print_r($list);
Array
(
    [0] => KCl
    [1] => MnCl2
    [2] => Cl2
    [3] => H2O
)