Question 389558
(3)/(x+1)+(x+2)/(x+1)

The numerators of expressions that have equal denominators can be combined.  In this case, (3)/((x+1)) and ((x+2))/((x+1)) have the same denominator of (x+1), so the numerators can be combined.
(3+(x+2))/(x+1)

Simplify the numerator of the expression.
(3+x+2)/(x+1)

Add 2 to 3 to get 5.
(5+x)/(x+1)

Reorder the polynomial 5+x alphabetically from left to right, starting with the highest order term.
(x+5)/(x+1)