$sen\:\left(3x\right)dx+2\:cos\left(3x\right)dy=0$

$\int_{tanx}^{\frac{1}{x}}\left(sen\:t^2\right)dt$

$f\left(x\right)=x^2sin\left(x\right)+x\cos\left(x\right)$

$\frac{d}{dx}\left(\frac{\left(x+1\right)^{10}}{\left(4x-16\right)^9}\right)$

$\left[+21+\left(17-15\right)-54\right]-\left\{11\right\}$

$\lim_{x\to0}\left(\frac{9^x-5^x}{9x}\right)$

$\lim_{x\to\infty}\:\frac{4^x}{x^3}$