$6,3cm+2,4cm+2,1cm+2,7cm+2,8cm+2,6cm$

$\int\frac{5x+9}{x^2-10x+21}dx$

$\int_x^1\left(xe^y\right)dy$

$\frac{\left(abc\right)^{-5}}{\left(abc\right)^{-2}}$

$\left(3x-\frac{1}{9}\right)\left(3x+\frac{1}{9}\right)$

$\frac{p+1-p^3-p^2}{p^3-p-2p^2+2}$

$\lim_{x\to\infty}\left(x^2+x\right)^{\frac{1}{x}}$