mvp 1.0-19

• remove mathjax dependency
• approximate equality

mvp 1.0-18

• pure extraction
• code of conduct
• contributing guide
• pkgdown

mvp 1.0-17

• single-letter symbols
• bugfixes
• vectorized exponentiation

1.0-10

• minor bugfixes

1.0-8

• consistentification

mirror server hosted at Truenetwork, Russian Federation.