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.
0.5*x*(1 + tanh(sqrt(2/pi) * (x + 0.044715 * x^3))) where x = -5
0.5*x*(1 + tanh(sqrt(2/pi) * (x + 0.044715 * x^3))) where x = -5
Natural Language
Math Input
Extended Keyboard
