+Addition and subtraction ± addition or subtraction × times △ divided by = = equal to ≠ not equal to ∠ equal to or approximately equal to ≈ approximately equal to < less than > greater than ≠ not greater than ≤ less than or equal to ≥ greater than or equal to% ‰ / mill ∞ infinity ∞ varies with √ (Square) root ∵ because ∵ therefore ∷ equals, as (proportion) ∵ angle ⊙ circle ⊙ circle ≌ circle ≌ circle ≌ ⊥ vertical ∪ and ∩ intersection ∫ integral ∑ (σ) ° degree ′ minute ″ s ∑ (sigma) summation open bracket, bloom tight bracket, closed curl (open bracket, left bracket) right bracket, right bracket / round bracket [left bracket] right bracket, period, dot | vertical line, vertical line and and sign, reference, asterisk, multiplication, star, pointer / slash, division, slash / / slash, comment point, backslash, sometimes escape Tilde, full stop, comma: colon, semicolon, question mark, exction point, apostrophe, hyphen, Dash / ellipsis, single quotation mark, double quotation mark, parallel sum sign = and swing dash section split → arrow. Period comma colon semicolon exction mark question mark ~ hyphen 'apostrophe dash single quotation mark double quotation mark () bracket [] square bracket French quotation mark ellipsis series colon xxxdittoxxx parallel / virtual & sum sign = and swing dash? Segmentation → arrow + plus minus ± plus or minus × times △ divide by = equal to ≠ not equal to ∠ equivalent to ≌ equal to ≌ approximately equal to ≌ less than ﹥ greater than ≌ not greater than ≤ If (proportion) ∩ angle ∩ half circle ∩ half circle ∩ half circle ∩ half circle ∩ circle ∩ circle ∩ circle ∩ circle ∩ circumference 8745∩ and ∩ and ∩ ∩ ∩ and ∩ ∩ ∩ several degrees centigrade .