Odpowiedź:
[tex] - 7 {}^{2} = - ( - 7) {}^{2} [/tex]
[tex]2 {}^{7} = - ( - {2})^{7} [/tex]
[tex]( - 7) ^{2} = 7 {}^{2} [/tex]
[tex] - 2 {}^{7} = ( - 2) {}^{7} [/tex]
