1. Wolfram Alpha: Wolfram Alpha is a powerful computational knowledge engine that can solve complex math problems, perform calculations, and provide step-by-step solutions.

2. Symbolab: Symbolab is an AI-powered math solver that can solve a wide range of math problems, including algebra, calculus, trigonometry, and more. It provides detailed step-by-step solutions and explanations.

3. Mathway: Mathway is an AI-powered math problem solver that can solve various math problems, including algebra, calculus, statistics, and more. It provides step-by-step solutions and allows users to input their own problems.

4. Photomath: Photomath is an AI-powered math solver that can solve math problems by simply taking a picture of the problem. It provides step-by-step solutions and explanations.

5. Microsoft Math Solver: Microsoft Math Solver is an AI-powered math problem solver that can solve a wide range of math problems, including algebra, calculus, trigonometry, and more. It provides step-by-step solutions and allows users to input their own problems.

These tools are available for free and can be accessed online or through mobile apps. They are great resources for students and anyone who needs help with math problem-solving.