$\frac{10-5secx6}{sec^2x}$

$2\sqrt{a}+3\sqrt{b}+\left(-5\sqrt{c}\right)+\frac{7}{3}\sqrt{a}+\left(-3\sqrt{c}\right)$

$\cos\left(4\pi x\right)=0$

$x^2-6x+36>0$

$\lim_{x\to a}\left(\frac{\left(x^2-\left(a+1\right)x+a\right)}{x^2-a^2}\right)$

$\frac{1}{8+2x^3}$

$\frac{\sin\left(x\right)}{\left(1+\cos\left(x\right)\right)}=\csc\left(x\right)$