$+z-5z$
$\frac{x^3+2x^2+1}{x+2}$
$x^2+\sqrt{3x}$
$3x+11\le14x+8$
$\frac{1}{2}\log\left(4x+1\right)+\frac{1}{2}\log\left(x-3\right)-\log\left(x^4-x^2-7\right)$
$4\:sin^2x+8cos\:x-7=0$
$h\left(z\right)=\ln\left(\sqrt{\frac{d^2-z^2}{d^2+z^2}}\right)$
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