$2+\cot\left(y\right)^2+\tan\left(y\right)^2$
$\cos\left(x\right)-\frac{\sin\left(x\right)}{\cos\left(x\right)}=\frac{1}{\cos\left(x\right)}$
$\left(6b^2+2\right)^4$
$\left(-4x-3\right)^3$
$y''+y'+2y=0$
$a^2\:-\:\frac{2a}{7}\:+\:n$
$-36+x<8$
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