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\(=\dfrac{3^{10}.3.11+\left(-1\right).3^{11}.\left(-1\right).3.7}{3^9.2^5}\\ =\dfrac{3^{11}.11+3^{12}.7}{3^9.2^5}\\ =\dfrac{3^9\left(3^2.11+3^3.7\right)}{3^9.2^5}\\ =\dfrac{9.11+27.7}{2^5}\\ =\dfrac{99+189}{32}\\ =\dfrac{288}{32}=9\)
A = \(\dfrac{3^{10}.33+\left(-3\right)^{11}.\left(-21\right)}{3^9.2^5}\)
A = \(\dfrac{3^{10}.3.11-3^{11}.\left(-21\right)}{3^9.2^5}\)
A = \(\dfrac{3^{11}.11+3^{11}.21}{3^9.2^5}\)
A = \(\dfrac{3^{11}.\left(11+21\right)}{3^9.2^5}\)
A = \(\dfrac{3^{11}.32}{3^9.32}\)
A = 32
A = 9
\(25-\left(62+25\right)+\left(75-62\right)-\left(-25\right)\)
\(=25-62-25+75-62+25\)
\(=\left(25-25\right)+\left(-62-62\right)+\left(75+25\right)\)
\(=0+\left(-124\right)+100=224\)
39\(\times\)25 + 87\(\times\)61 + 62
= 975 + 5307 + 62
= 6282 + 62
= 6344