t 1.2-4p a(146+449):(3x5)+(898-23):25; b (8617-1345):(2x3)-(29-28x29);
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a) 



b) [tex](8617-1345):(2*3)-(29-28*29) \\ = 7272-(29-812) \\ =7272-29+812 \\ =7243+812 \\ = 8055[/tex]
b) [tex](8617-1345):(2*3)-(29-28*29) \\ = 7272-(29-812) \\ =7272-29+812 \\ =7243+812 \\ = 8055[/tex]
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