$\cos\left(x\right)+\cos\left(2wy-x\right)$
$\left(d-9\right)\left(d+5\right)$
$4c+16$
$\lim_{x\to a}\frac{\left(sec\left(x\right)-sec\left(a\right)\right)}{x-a}$
$a^3\:-\:8y^3$
$2x+1=x+2$
$3.14+-2.75+-5.29+1.35$
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