$-3-4\:-\:\left(3-6\right)-\left(8+5\right)$
$-132-185$
$\left(-9+4i\right)\left(9+i\right)$
$4k^2+4k=5$
$cscx\:\left(1\:-\:cos\:2\:x\right)\:=\:sinx$
$\left(\frac{2x-2y}{2-1z^3}\right)^2$
$sen\:x\:-\:tan\:x$
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