Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
2tan(x)-x,x=-1.45882647353042609108889471065973152428619264406573209350 i
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
