$\sin\left(x+20\right)+\cos\left(x-70\right)$

$\lim_{x\to\infty}\left(\frac{ln\left(1+\frac{9}{x}\right)}{\frac{1}{x}}\right)$

$3^9\cdot3^{-4}$

$\frac{1}{2}[\sen\left(t+v\right)+\sen\left(t-1\right)$

$\int_1^{ln\left(x\right)}\left(\frac{ln\left(t\right)}{t^4}\right)dt$

$x^5y+x^3y$