| Name | Lines of code | Maintainability | Test coverage |
| src/Solving/RationalEvaluator.php | 278 | D 1 day | |
| src/Solving/StdMathEvaluator.php | 196 | D 2 days | |
| src/Solving/StdMathVisitor.php | 20 | A 0 mins | |
| src/Solving/TreePrinter.php | 71 | A 0 mins | |
| src/Solving/Visitor.php | 20 | A 0 mins | |
| src/StdMathEval.php | 30 | B 5 hrs |