$$17ab-3ab+5ab+3$$

$$\cot\left(-u\right)$$

$$\int17\left(\tan\left(x\right)\right)\left(ln\left(\cos\left(x\right)\right)\right)dx$$

$$\left(z-9\right)\left(z+10\right)$$

$$\lim_{x\to0}\left(\frac{2+x^2+\cos\left(x\right)}{x^{16}}\right)$$

$$5\left(20\right)+6+7$$