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**yoman360** 1) Find the area enclosed by the curves $\displaystyle y=x^2$ and y=x

My answer: $\displaystyle \frac{1}{6}$

2) Find the area bounded by the curves: $\displaystyle x=-y^2$ and $\displaystyle x=-y-2$

My answer: $\displaystyle \frac{-9}{2}$

3) Evaluate: $\displaystyle \int \frac{2x}{(x^2+1)^3} dx$

My answer: $\displaystyle \frac{-1}{2}(x^2+1)^{-2}+c$

4) Find the equation of the tangent line to y=sin(3x) where $\displaystyle x=\pi$

My answer: $\displaystyle y=-3(x-\pi)$

If any of my answers are incorrect then please let me know which one(s).