$y'+\left(\tan\:\left(t\right)\right)y=\sin\:\left(t\right)$

$6^8\cdot6^5$

$\sin x\left(+\cot x\right)+\cos x\left(1-\tan x\right)$

$ln\left(x^{7cos\left(x\right)}\right)$

$\:\left(7a^2\:-\:25\:x^3\right)^2$

$\lim_{x\to3}-\left(x-3\right)$

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