simplify (2^2+3^2-4^2)÷(3/2)^2
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(2^2+3^2-4^2)÷(3/2)^2
= (4+9-16)÷(9/4)
= (13-16)÷(9/4)
= -3÷(9/4)
= -3×(4/9)
= -4/3
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