x← * 2 7 1 8 2 8 (-\x) - +\x×(⍴x)⍴1 ¯1 0 0 0 0 0 ¯9.09495e¯13 (÷\x) - ×\x*(⍴x)⍴1 ¯1 0 0 0 ¯8.47033e¯22 ¯6.77626e¯21 ¯3.30872e¯24