tính (tính nhanh nếu có thể) 4) 17x85-17x185-(-170) 5) 3250 - (-4 +19)^2x[(4^4-2^5):16]

` # Traam `

` 4 )  17 × 85 - 17 × 185 - ( - 170 ) `

` = 17 × ( 85 - 185 ) + 170 `

` = 17 × ( -100 ) + 170 `

` = -1700 + 170 `

` = -1530 `

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` 5 )  3250 - ( -4 + 19 )^2 × [ ( 4^4 - 2^5 ) : 16 ] `

` = 3250 - 15^2 × [ ( 256 - 32 ) : 16 ] `

` = 3250 - 225 × [ 224 : 16 ] `

` = 3250 - 225 × 14 `

` = 3250 - 3150 `

` = 100 `