[" 3.The value of "],[qquad (1+(1)/(x))(1+(1)/(x+1))(1+(1)/(x+2))(1+(1)/(x+3))" is: "]

Find the value of ( 1 + 1/x ) ( 1 + 1/( x+1 )) ( 1 + 1/( x+2 ) ) ( 1 + 1/( x+3 )) is : (1) 1 + (1/(x + 4 )) ( 2 ) x +4 ( 3 ) 1/x ( 4 ) ( x+4 )/x

If x-(1)/(x)=1 , then what is the value of ((1)/(x-1)-(1)/(x+1)+(1)/(x^2 +1)-(1)/(x^2 -1)) ?

The value of int_(1)^(3)(sqrt(1+(x-1)^(3))+(x^(2)-1)^(1/3)+1)dx is __________.

The value of int_(1)^(3)(sqrt(1+(x-1)^(3))+(x^(2)-1)^(1/3)+1)dx is __________.