\(\displaystyle{a}{)}{\left\lbrace-{6}\right\rbrace}\)

\(\displaystyle{b}{)}{o}{s}{l}{a}{s}{h}\)

\(\displaystyle{\left\lbrace-{6}\right\rbrace}\)

\(\displaystyle{\left(-\infty,-{6}\right)}\cup{\left(-{6},+\infty\right)}\)

\(\displaystyle{\left(-\infty,+\infty\right)}\)

\(\displaystyle{b}{)}{o}{s}{l}{a}{s}{h}\)

\(\displaystyle{\left\lbrace-{6}\right\rbrace}\)

\(\displaystyle{\left(-\infty,-{6}\right)}\cup{\left(-{6},+\infty\right)}\)

\(\displaystyle{\left(-\infty,+\infty\right)}\)