$1-\sin\left(x\right)\cdot\cos\left(x\right)\cdot\tan\left(x\right)=\cos^2\left(x\right)$

$7\left(1+n\right)-9\left(8n-1\right)$

$m^2-9m+14$

$\log_{2-3x}\left(125\right)=3$

$\lim_{x\to\frac{\pi}{2}}\left(\frac{\tan\left(x\right)}{x-\frac{\pi}{2}}\right)$

$\int\frac{5x+9}{\left(x+1\right)^2}dx$

$\int_{-\infty}^1\frac{1}{x^2-4x+8}dx$