Find the area

f(x)=10x/x^2+1, y=0, 0 less than or equal to x less than or equal to < 5

integral 10x/(x^2 + 1) dx from 0 to 5

= 5ln(x^2 + 1) | from 0 to 5
= 5ln 26 - 5ln1
= 5 ln 26 - 0
= 5 ln 26