Find the equation of the normal to the curve `y = 5x + x^2` which makes an angle `45^@` with x axis.

Find the equation of the normal to the curve `y = 5x + x^2` which makes an angle `45^@` with x axis.
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Find the equation of the normal to the curve `y = 5x + x^2` which makes an angle `45^@` with x axis.
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