$\ln\left(y\right)=\ln\left(3x\right)\ln\left(\sqrt{x}\right)$

$4\left(2x+6\right)=8x+24$

$4\int dx$

$\int\left(x^2+1\right)\cdot\:\sqrt{2x+1}dx$

$\left(2-3\cdot4+5^2\right)$

$\cos^2\tan^2=1-\cos^2$

$\frac{\sin\left(x\right)+\sin\left(3x\right)}{\sin\left(2x\right)}$