Замените звёздочку степенью.

1) a^11 * = a^13 => * = a^(13-11) = a^2, 2) a^1 * = a^16 => * = a^(16-1) = a^15, 3) a^7 : * = a^3 => * = a^(7-3) = a^4, 4) * : a^12 = a^25 => * = a^(25+12) = a^37, 5) a^4 * = a^23 => * = a^(23-4) = a^19, 6) a^13 = a^3 * a^2 => a^13 = a^(3+2) = a^5.