$2\sin a+\sqrt{3}=0$
$\left(6a^2+5\right)\left(6a^2-7\right)$
$-1\:+\:36\:-\:45\:-\:11\:-5$
$\left(-13x-11\right):\left(-3\right)<\left(-6x-2\right):\left(-2\right)+3x$
$\int\left(\frac{4x+9}{x^2+12x+9}\right)dx$
$\left(a^2-5a+6\right)\cdot\left(a+5a-6\right)$
$x2\:-\:26x\:-\:120\:=\:0$
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