Is there any good calculus calculator with steps? Either online or not is fine. I know wolfram but it requires me to upgrade to Pro. Others like https://www.integral-calculator.com can't deal with complex ones. Any recommendations? Thanks much in advance.
If you can program in RPN on an HP programmable calculator, you have no real limitations. RLM Software provides non-graphing versions of popular HP programmable calculators which includes the scientific version HP-11C. Another site, PG Calculator also has an RPN/Algebraic programmable graphing version.
I purchased the HP calculator for both iOS and for Windows, but have not pursued the PG 6 from the latter link.