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.
4
0
7
+
7
1
2
4
1
²
-
x
²
=
4
0
8
4
1
²
-
4
0
3
-
x
4
1
²
Math Input
Natural Language
Math Input