$w^2+14w$

$\lim_{x\to0}\left(\frac{e^x-x-cos\left(x\right)}{[sen\left(x\right)]^2}\right)$

$\left(a+9\right)^2=a^2+y\:a+81$

$\frac{1+cos\left(2y\right)}{sin\left(2y\right)}=cot\left(y\right)$

$-3-y$

$m\left(x\right)=\frac{\frac{1}{2}x^2-6+10}{\left(x-2\right)^2}$

$-40\cdot58$