In the expansion of (c+6)2\displaystyle {\left({c}+{6}\right)}^{{2}}, the coefficient of the c\displaystyle {c} term is   .

In the expansion of (c4)2\displaystyle {\left({c}-{4}\right)}^{{2}}, the coefficient of the c\displaystyle {c} term is   .

In the expansion of (c+95)2\displaystyle {\left({c}+\frac{{9}}{{5}}\right)}^{{2}}, the coefficient of the c\displaystyle {c} term is   .

In the expansion of (c95)2\displaystyle {\left({c}-\frac{{9}}{{5}}\right)}^{{2}}, the coefficient of the c\displaystyle {c} term is   .