$$\lim_{h\to0}\left(\frac{10^{\sqrt{x+h}}-10^{\sqrt{x}}}{h}\right)$$

$$\left(\frac{a}{6}+\frac{x}{5}\right)\left(\frac{a}{6}-\frac{x}{5}\right)$$

$$y=\ln\left(\frac{1-x}{\left(x+5\right)^5}\right)$$

$$3-\left(18-\:4\right)+\left(-5\right)\:\cdot\left(-6\right)$$

$$3x^2-x-1>0$$

$$4\cos^7\left(x\right)+3yx\cos^2\left(x\right)+\cos^2\left(x\right)$$

$$\int\left(4y+2t-5\right)dt$$