http://j7fdhuj7hly22vxrhlibh7khuigiqza4tw27d72oofemfgta2lqqzwqd.onion/blog/math-unicode
List (in no particular order): Computational 2716 ✖ multiplication 00f7 ÷ division 221a √ sqrt 221b ∛ sqrt³ 221c ∜ sqrt⁴ 222b ∫ integral 222c ∬ integral double 222d ∭ integral tripple 27cc ⟌ long division 2032 ′ first derivative 2033 ″ second derivative 2034 ‴ third derivative 2202 ∂ partial derivative 2211 ∑ sum 00ba º degree 2260 ≠ not equal 2261 ≡ if and only if, idential 2262 ≢ not identical 2264 ≤ less than or equal to 2265 ≥ greater than or equal to 2270 ≰ not less than or equal to...