$3^{\left(x+1\right)}\cdot27^{\left(x+3\right)}=9^{\left(3x+4\right)}$

$\int\frac{\left(x-2\right)}{\left(x^2+2x+4\right)}dx$

$\lim_{x\to0}\left(\cos\left(\frac{3.14159265359}{2}-x\right)\right)^x$

$3x^{-\frac{2}{5}}$

$x^2+2y^{\left(4\right)}^3$

$\left(3^2y^5\right)^3$

$\int\frac{x+3}{x\left(x+9\right)^2}dx$