Calcule :
a) -7² + (-7)² b) -2³-30+1 c) (- \frac{2}{3} )³+1 d) -5²+(-3)²-10 e) 3³+ 3^{-2}
f)  5^{0} -(-1).(- \frac{1}{2} )² g) (1- \frac{1}{2} ^{4}
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