Can sombody please help me convert this formula to arduino code.

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hi all. new here.

can please me convert formula arduino can use it.

it work out wet bulb temperature if have dry bulb , relative humidity %

tw =  20 atan[0.151 977 (50 + 8.313 659) power 1/2] + atan(20 + 50) - atan(50 - 1.676 331) + 0.003 918 38(50) power 3/2 atan(0.023 101 * 50)  - 4.686 035

answer should be

13.7

what *** this?
code: [select]
0.003 918 38(50)


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