14-14m
3a-3a²
3¹⁶÷(3⁵)₃
6⁸×(6⁵)⁴÷6²⁵
(x-5)(y-7)
(5m-2n)(3m+n)
(x+7)(x-7)
(c+2) (c-2) - 4c (c-1)
[tex] \frac{5x-2}{3}+ \frac{2x-1}{5}= \frac{4-x}{4} [/tex]