determine the exact value of the following:

[tex]cos \: {30}^{o} + \: tan \: {45}^{o} = [/tex]
[tex]sec \: {60}^{o} - sin \: {30}^{o} = [/tex]
[tex]2(sin {30}^{o} ) - tamn {45}^{o} = [/tex]
[tex] {sec}^{2} {45}^{o} + csc \: {30}^{o} = [/tex]

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