What's Changed
* Attempt to remove unnecessary parentheses by alxy in https://github.com/erwanp/pytexit/pull/16
* Simplify the travis script by alxy in https://github.com/erwanp/pytexit/pull/21
* improved parenthesis usage by phidi04 in https://github.com/erwanp/pytexit/pull/23
* Turner-eng issue5 by turner-eng in https://github.com/erwanp/pytexit/pull/26
* Issue-20_DevTools: Adding dev tools to .travis.yml by manelbdcosta in https://github.com/erwanp/pytexit/pull/27
* Numpy exponential format by emetor in https://github.com/erwanp/pytexit/pull/38
* Typo for unary operator + by emetor in https://github.com/erwanp/pytexit/pull/39
* Fixing tests by emetor in https://github.com/erwanp/pytexit/pull/42
* Replace the '$$' tex enclosure with a function input by emetor in https://github.com/erwanp/pytexit/pull/43
* pow(x,y) enabled 35 by emetor in https://github.com/erwanp/pytexit/pull/44
* Solving issue 37: \times not displayed between numbers with exponents by emetor in https://github.com/erwanp/pytexit/pull/45
* Addressing issue 41 by emetor in https://github.com/erwanp/pytexit/pull/46
* Problem with unary opeation not by emetor in https://github.com/erwanp/pytexit/pull/40
* Reworking simplify_output by emetor in https://github.com/erwanp/pytexit/pull/47
* Unary operator followed by a power needs no parenthesis by emetor in https://github.com/erwanp/pytexit/pull/49
* SyntaxError when expression has "lambda" or λ 50 by emetor in https://github.com/erwanp/pytexit/pull/51
* Update setup.py by anukaal in https://github.com/erwanp/pytexit/pull/48
* temp fix for 54 : deactivate PYthon 3.7 testing by erwanp in https://github.com/erwanp/pytexit/pull/55
New Contributors
* alxy made their first contribution in https://github.com/erwanp/pytexit/pull/16
* phidi04 made their first contribution in https://github.com/erwanp/pytexit/pull/23
* turner-eng made their first contribution in https://github.com/erwanp/pytexit/pull/26
* manelbdcosta made their first contribution in https://github.com/erwanp/pytexit/pull/27
* emetor made their first contribution in https://github.com/erwanp/pytexit/pull/38
* anukaal made their first contribution in https://github.com/erwanp/pytexit/pull/48
**Full Changelog**: https://github.com/erwanp/pytexit/compare/0.3.3...0.4.0