$4\left(1+\senx\right)\left(\sec x+\tan x\right)=\cos x$
$8a^3-4ab-20a^2+10b^3$
$3loga-2logb$
$29\cdot28\cdot27\cdot26\cdot25\cdot24\cdot23\cdot22\cdot21\cdot20\cdot19\cdot18\cdot17\cdot16\cdot15\cdot14\cdot13\cdot12\cdot11\cdot10\cdot9\cdot8\cdot7\cdot6\cdot5\cdot4\cdot3\cdot2\cdot1$
$\left(6x+8y\right)\left(6y-3y\right)$
$m-16=n$
$\left(9m^6-3n\right)^2$
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