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

$7x+5<-2\left(4x-3\right)$

$72y+43y+24x+32y+21x+12x$

$\frac{dy}{dt}+e^ty=0$

$\frac{x^2}{4+x^2}$

$\lim_{x\to\infty}\left(\frac{ln\left(9x+4\right)}{ln\left(3x+8\right)+6}\right)$

$14abc+28a^2bc^2$