1Expression Add OperatorsHardMathStringBacktracking
Solve → 2Expression Add OperatorsHardMathStringBacktracking
Solve → 3Expression Add OperatorsHardMathStringBacktracking
Solve → 4Expression Add OperatorsHardMathStringBacktracking
Solve → 5Multiply StringsMediumMathStringSimulation
Solve → 6Expression Add OperatorsHardMathStringBacktracking
Solve → 7Multiply StringsMediumMathStringSimulation
Solve →