$\frac{\left(n^2+1\right)}{\sqrt{9^n+1}}\left(x-7\right)^n$

$x^{-1}\left(x^{-5}\right)$

$\left(05mn\right)^2$

$\frac{dy}{dx}cos^{-1}\left(3x^3+5\right)$

$\int\left[\left(z^2+2z\right)\left(cosz\right)+z^2\right]dz$

$\log\left(x+5\right)=\log\left(5x-3\right)$

$\int_1^{\infty}\left(\frac{1}{6x-1}\right)dx$