Question

is Wolf crazy?
http://www.wolframalpha.com/input/?i=differentiate+abs%28x%29%2Fx+at+x%3D0

Answer 1

Indeed, another example of wolfram's craziness http://www.wolframalpha.com/input/?i=sec%283pi%2F2%29+-+tan%283pi%2F2%29

Answer 2

this is insane

Answer 3

Indeed, this wolf is crazy.

Answer 4

i like wolves

Answer 5

here's one that's just another reason not to give DE's to the wolf
http://www.wolframalpha.com/input/?i=4y%27%27%2B8y%27%2B2y%3Dcos%5E2x

Answer 6

this is crazy too. Maple does it simply.