\(\left(2x-1\right)\left(3x+5\right)+\left(-6x^3+5x\right):x\)
\(=6x^2+10x-3x-5-6x^3+5x:x\)
\(=-6x^3+6x^2+12x-5:x\)
\(=-6x^2+6x+12-\dfrac{5}{x}=-6\left(x^2-x-12\right)-\dfrac{5}{x}\)
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A = (2\(x\) - 1)(3\(x\) + 5) + (-6\(x\)3 + 5\(x\)): \(x\)
A = 6\(x^2\) + 10\(x\) - 3\(x\) - 5 + \(x\)(- 6\(x^2\) + 5): \(x\)
A = 6\(x^2\) + 7\(x\) - 5 - 6\(x^2\) + 5
A = (6\(x^2\) - 6\(x^2\)) + 7\(x\) - (5 - 5)
A = 7\(x\)
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