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.
s
u
m
n
f
r
o
m
1
t
o
2
0
1
7
o
f
1
n
Math Input
Natural Language
Math Input
