$\int\frac{\left(x^2-2\right)}{\left(x^2+6x+11\right)^2}dx$
$a^4\:+\:4\:a^2\:b\:+\:4\:b^2$
$x^2\:a^2-1+9^2-1$
$\left(\cos\left(x\right)+6\right)\left(\cos\left(x\right)-6\right)$
$2x+3\le3x-10$
$\sqrt{2-2cosx}$
$\int\frac{\left(30x-10\right)^2}{3x-5}dx$
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