$\log\left[\left(x^2-2x-3\right)^2\right]-\log\left[\left(x-3\right)^2\right]=\log\left[\left(x+1\right)^2\right]$

$\left(6x+9^2\right)$

$\lim_{x\to0}\left(\frac{ln\left(a+x\right)-ln\left(a\right)}{x}\right)$

$f\left(x\right)=3x^2+8x^{-5}+5x^{-3}$

$\left(\frac{a^4}{4}\right)^{-\frac{1}{2}}$

$4h\:-\:2e^2+\:6;\:h=-2;\:e=\:-1$

$\cos^4\left(x\right)\sin\left(x\right)-2\cos^2\left(x\right)\sin\left(x\right)+\sin\left(x\right)$