Question: Do you know of an online math solver that supports multiple input methods, such as text, images, and PDF files?

The AI Math Solver is a general-purpose tool that uses artificial intelligence to handle a broad range of math problems. It can accept input from text, photos, PDFs and CSV files, so it works on a variety of devices and operating systems. It's good for students who need help with advanced math subjects like algebra, calculus and geometry, with explanations of steps and an interactive problem-solving interface.

Another powerful option is Photomath, which can scan a photo or accept input with a smart calculator interface. It's geared for students, covering elementary school through college-level subjects, and offers immediate answers with multiple solution methods, step-by-step explanations and customizable visualization. It works on phones and tablets, so it's good for students who need help in the field.

Mathpix is an AI-powered system that can convert images, handwritten notes and PDFs into editable text documents with sophisticated OCR technology. It can recognize mathematical equations, chemical diagrams and tables and convert them into various digital formats. It's good for education, accessibility and bulk digitization, with flexible pricing options and an on-premise option for secure document processing.

For a more general-purpose tool that can accept a lot of different input methods and handle a lot of subjects, check out Wolfram|Alpha. This computational knowledge engine can provide step-by-step solutions, function plotting, statistical calculations and lots more. It can accept input in a variety of ways, including file uploads and image processing, so it's good for educational and professional use.