a) (-5) * [3*(-2) -(-8)*(-1)] = (-5) * [(-6) - 8]=(-5)*(-14)=70
b) (-6) ^2 - (-7)^2 = 36-49=(-13)
c) (-3)*[(-7)^2 - 8^2] +5 [(-3)^3 +4^2] = (-3)*[49-64]+5*[(-27)+16]=45+5*(-11)=45-55=-10
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a) (-5) * [3*(-2) -(-8)*(-1)] = (-5) * [(-6) - 8]=(-5)*(-14)=70
b) (-6) ^2 - (-7)^2 = 36-49=(-13)
c) (-3)*[(-7)^2 - 8^2] +5 [(-3)^3 +4^2] = (-3)*[49-64]+5*[(-27)+16]=45+5*(-11)=45-55=-10