$\frac{d^4}{dx^4}\left(3.\sin\left(x\right)+5.\cos\left(x\right)\right)$

$\int\frac{\sqrt{x^2+49}}{x^3}dx$

$csc\left(t\right)\:sec\left(t\right)\:\left(cot\left(t\right)\:+\:tan\left(t\right)\right)\:=\:sec^2\left(t\right)\:+\:csc^2\left(t\right)$

$x^{2-6x+9}$

$\cos\:\theta\:\left(\sec\:\theta\:-\cos\:\theta\:\right)$

$y'-yln\left(x\right)=0$

$-1b-10$