$\lim_{x\to0}\left(\frac{\left(6+10x^2\right)^{\frac{1}{2}}}{4+5x}\right)$

$4x^2+28x+45=0$

$y8-1$

$\frac{dy}{dx}\left(z=cos\left(x^5y^6\right)\right)$

$46-\left|38-\left(-3\right)+-10+\left(42-18+-15-\left(-6\right)\right)\right|$

$3x^2+5x-6\ge3$

$\frac{\sec^2\left(x\right)-1}{\sin^2\left(x\right)}=\tan^2\left(x\right)+1$