$\text{a)}$  

$M=\left(11-\left(-3\right),-9-\left(-7\right)\right)$  

$M=\left(14,-2\right)$  

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$\text{b)}$      

$M=\left(-5-6,-\frac{1}{2}-\left(-3\right)\right)$  

$M=\left(-11,2\frac{1}{2}\right)$  

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$\text{c)}$  

$M=\left(1-\left(-4\right),\sqrt{10}-3\sqrt{10}\right)$  

$M=\left(5,-2\sqrt{10}\right)$  

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$\text{d)}$  

$M=\left(2-\sqrt{6}-\left(-2\right),8-\left(-2\right)\right)$  

$M=\left(4-\sqrt{6},10\right)$  

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$\text{e)}$  

$M=\left(3-2\pi ,3+\pi -\pi \right)$  

$M=\left(3-2\pi ,3\right)$  

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$\text{f)}$  

$M=\left(3\sqrt{3}-\left(2-\sqrt{2}-\sqrt{3}\right),4-0\right)$  

$M=\left(4\sqrt{3}-2+\sqrt{2},4\right)$  

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$\text{g)}$  

$M=\left(3n-\left(-2\right),n+5-\left(2n+1\right)\right)$  

$M=\left(3n+2,n+5-2n-1\right)$  

$M=\left(3n+2,-n+4\right)$  

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$\text{h)}$  

$M=\left(\frac{n+1}{2}-\frac{1}{2},n-\sqrt{2}-\left(2n+\sqrt{2}\right)\right)$  

$M=\left(\frac{n}{2}+\frac{1}{2}-\frac{1}{2},n-\sqrt{2}-2n-\sqrt{2}\right)$  

$M=\left(\frac{n}{2},-n-2\sqrt{2}\right)$