book Maths Puzzle Numerical Ability

Can someone help me?

Find the equation of the line, in slope-intercept form, of the line that passes through the point (1,4) with slope 3.

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book Other Question
find the value of
5 X 10^-5
_____________
25 X 10^3
 Expand and show the working out for the following question:

abc((a + b^2 + c^3)c) =

Thanks in advance