Представьте выражение в стандартном виде многочлена:
a) 7b(4c - b) + 4c - 7b
б) 12c⁴ - 2.5c² * (6c² + 0.4c - 2)
в) 2a*(5a - 2) - 5(2a² - a + 3) ;
г) (x²- 5xy + 3y²) * 2x + 5y(2x² - 1, 2xy)​
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