CalcifyAI

We've resolved a critical bug in the integration by parts solver that was causing incorrect signs to appear during the second iteration of calculations. Your step-by-step solutions will now display the correct mathematical notation throughout the entire solving process. Additionally, we fixed an issue where u-substitution steps were disappearing on mobile devices. All solving steps are now properly visible across all screen sizes, ensuring a seamless learning experience whether you're studying on a phone, tablet, or desktop.