const e = "5 + 7) * (3 * 5)";
function isCorrectFormula(exp) {
const stack = [];
const arrOfInput = exp.split("").filter((char) => char != " ");
for (const char of arrOfInput) {
if (char == "(") {
stack.push(0);
continue;
}
if (char == ")") {
if (stack.length == 0) {
return false;
}
stack.pop();
}
}
if (stack.length == 0) {
return true;
}
return false;
}