$\left(\sec\left(x\right)-\cos\left(x\right)\left(\cos\left(x\right)\right)\right)$

$\left(1+\tan\left(x\right)^2\right)\left(1+\tan\left(x\right)^2\right)$

$\frac{d}{dx}\left(\sin x-\cos y-4=0\right)$

$25-8.457$

$1-\frac{1}{-1}$

$\left(5m^3-4n^4\right)^2$

$\frac{cos^2\left(x\right)}{\left(1+sin\left(x\right)\right)^2}=\frac{1-sinx}{1+sinx}$