$4x^2-12x+25$
$\left(-2\right)^8\cdot\left(-2\right)^0$
$3\left(1-\cos\left(x\right)\right)$
$\:\left(ab\:-1\right)\:\left(ab\:+1\right)\:$
$\int\left(9-2x^2\right)^3\left(-4x\right)dx$
$\left(a-9b\right)^2=18$
$\lim_{x\to0}\left(\frac{cos\left(x+a\right)-cos\left(x-a\right)}{x}\right)$
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