+ xo(x);
+ yo(y);
+ int const w = xcell(0).width();
+ xcell(0).draw(pain, x, y - 5 - xcell(0).descent()); // the "exponent"
+ xcell(1).draw(pain, x + w + 8, y); // the "base"
+ int const a = ascent();
+ int const d = descent();
+ int xp[5];
+ int yp[5];
+ xp[0] = x + width_; yp[0] = y - a + 1;
+ xp[1] = x + w + 4; yp[1] = y - a + 1;
+ xp[2] = x + w; yp[2] = y + d;
+ xp[3] = x + w - 2; yp[3] = y + (d - a)/2 + 2;
+ xp[4] = x; yp[4] = y + (d - a)/2 + 2;
+ pain.lines(xp, yp, 5, LColor::mathline);