(4x^2-1)/(16x^2)-1+(1)/(2x+1)+(1)/(2x-1)+(1)/(1-4x^2) (x+y)/(xy)-(2)/(x)(xy)/(x^2)-y^(2)

1. The given expression is . To simplify this expression, we can factor the numerators and denominators where possible. The expression simplifies to .2. The second expression is . To simplify this expression, we can factor out common terms and cancel them out. The expression simplifies to .Both expressions involve algebraic manipulation, including factoring, simplifying fractions, and canceling out common terms. These are common tasks in algebra, a branch of mathematics.