$x^2+4\ge0$
$8\int\cos\left(x\right)^2dx$
$\lim_{x\to-\infty}\frac{5-3x}{x-2}$
$\lim_{x\to\infty}\:\:\frac{4x+8}{9x^2+5x-9}$
$\left(2x^2-10u\right)^2$
$45\cdot100$
$36y^260xy+25x^2$
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