$16-8a^2+a^4$
$\lim_{x\to\infty}\left(\frac{\sqrt{x}-\sqrt{x-5}}{\sqrt{\left(x-5\right)}}\right)$
$\int110\cdot sec^2\left(x\right)dx$
$1x^2+4x$
$\left(-15\right)\cdot4\cdot\left(-2\right)$
$\sin\:2x+\sqrt{3}\sin\:x=0$
$\sin^2\left(x\right)+0.5\cos\left(x\right)=0.5$
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