Examples

Hello world:

"Hello, world"

GCD:

2706 410
{_@\%}h;

Non-trivial quine:

{`"_~"}_~

or

"`_~"`_~

Fibonacci:

T1{_2$+}A*]`

Factorial:

5
,:):*

Calculating e^x (without using "me"):

2
:X;1._K,{)/X*_@+\}/;

Python challenges:

0) Y38#
1) {__'`>\'x>26*2-*-}/
2) {_'`>\'{<&},
3) N/s:X,8-,{X>9<__{'a<},,\4%{'Z>},,*I={4=}{;}?}/