$\lim_{x\to2}\sqrt[3]{x+6}$
$3\sin^2\left(a\right)-\cos^2\left(a\right)=0$
$2x^2-9x+2\:=\:0$
$\int5\left(x-7\right)^2dx$
$y^2+21y+68$
$12.48+\left(-10.636\right)$
$x^2-10x+21<0$
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