\(=\dfrac{2^{12}\cdot3^5-2^{12}\cdot3^4}{2^{12}\cdot3^6+2^{12}\cdot3^5}-\dfrac{5^{10}\cdot7^3-5^{10}\cdot7^4}{5^9\cdot7^3+5^9\cdot2^3\cdot7^3}=\dfrac{2^{12}\cdot3^4\left(3-1\right)}{2^{12}\cdot3^5\left(3-1\right)}-\dfrac{5^{10}\cdot7^3\left(1-7\right)}{5^9\cdot7^3\left(1+2^3\right)}=\dfrac{1}{3}+\dfrac{30}{9}=\dfrac{11}{3}\)
\(M=\left(2x-1\right)\left(2y-1\right)=2xy-2x-2y+1\\ M=2xy-2\left(x+y\right)+1=32-20+1=13\)
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