$y'-\:y\tan\left(x\right)=\frac{1}{cosx}$

$234+124-65-23+90-87$

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

$\tan^{-1}\left(\frac{2}{6}\right)$

$a^2-4a+25$

$10x^7+14x^7-1z+0z+1z$

$y\left(x\right)y''\left(x\right)-\left(y'\left(x\right)\right)^2=\left(-y\left(x\right)^2ln\left(y\left(x\right)\right)\right)$