$c * \frac{1}{2}c - 0,1c^5 - c^3 + cc^2 * 2c^2 - c * \frac{1}{8}c + ccc = \frac{1}{2}c^2 - 0,1c^5 - c^3 + 2c^5 - \frac{1}{8}c^2 + c^3 = \frac{4}{8}c^2 + 1,9c^5 - \frac{1}{8}c^2 = 1,9c^5 + \frac{3}{8}c^2 = 1,9c^5 + 0,375c^2$

$\frac{1}{9}mm - m * \frac{1}{2}mm + 0,5m + mm * \frac{1}{8}m - \frac{1}{3}m^2 + \frac{1}{2}m = \frac{1}{9}m^2 - \frac{1}{2}m^3 + 0,5m + \frac{1}{8}m^3 - \frac{1}{3}m^2 + \frac{1}{2}m = \frac{1}{9}m^2 - \frac{4}{8}m^3 + \frac{1}{2}m + \frac{1}{8}m^3 - \frac{3}{9}m^2 + \frac{1}{2}m = -\frac{3}{8}m^3 - \frac{2}{9}m^2 + m$

$aba + aa - a * 2ab + bab - 2ba * 2b - 6a * 2b^2 - aa = a^2b + a^2 - 2a^2b + ab^2 - 4ab^2 - 12ab^2 - a^2 = -a^2b - 15ab^2$

$y * 2yy - y * 5xy + x * 3xy - xy * 6y + x * 12xy - y^3 = 2y^3 - 5xy^2 + 3x^2y - 6xy^2 + 12x^2y - y^3 = y^3 - 11xy^2 + 15x^2y$