\(a,5^3.2^2-17.2^3+120:15-72\\ =125.4-17.8+8-72\\ =500-136+8-72\\ =364+8-72\\ =372-72\\ =300\)
\(a,120-\left[5^2.2^2-\left(13-4\right)^2\right]\\ =120-\left(25.4-9^2\right)\\ =120-\left(100-81\right)\\ =120-9\\ =111\)
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