6.1 Areas Between Curves/25

${\begin{aligned}&\color {red}\mathbf {y=x^{2}} &\color {royalblue}\mathbf {y={\frac {2}{({x^{2}}+1)}}} \\\end{aligned}}$

Failed to parse (unknown function "\leftx"): {\displaystyle \int_{1}^{-1}\left(\frac{2}{({x^2}+1)}\right) - \left(x^{2}\right) dx = \int_{1}^{-1}\left(2\cdot\frac{1}{(x^{2}+1)}\right)-(\leftx^{2})\right) dx }