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.
-(t^2 + 2 t - 3)/(t^2 + t + 4)^2 /. t=0
-(t^2 + 2 t - 3)/(t^2 + t + 4)^2 /. t=0
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
