$\lim_{x\to0.001}\left(\frac{1-e^{4x}}{9x}\right)$

$\int\left(\frac{2x^2}{\left(2x-1\right)\left(x-1\right)\left(x+3\right)}\right)dx$

$\left(x^3+6x^2+9\right)\frac{3}{5}$

$\lim_{x\to2}\left(\frac{x^4-16}{x+2}\right)$

$\frac{e^{\left(x^5+x\right)\sin\left(x\right)}}{\sqrt{x^2+1}}$

$\sqrt[7]{\left|0.000013\right|^2}$

$\left(2a+b^2\right)^4$