$2\cot\left(a\right)\cot\left(2a\right)=\cot^2\left(a\right)-1$

$\int\frac{4x^6+2x^3+10}{x^8}dx$

$34.95+0.05$

$\lim_{x\to\frac{\pi}{2}}\left(2cos\left(5x\right)sec\left(7x\right)\right)$

$\sin\left(a\right)^2\left(1+\cot\left(a\right)^2\right)$

$\log_x\left(\frac{36}{49}\right)=2$

$\lim_{x\to\infty}\left(\frac{3+x}{2}\right)$