$\frac{\cos\left(90^{\circ}-a\right)}{\sena}$
$2\left(2\right)^{4}\left(-1\right)+\left(2\right)\left(-1\right)^{3}-8\left(2\right)^{2}\left(-1\right)$
$\frac{5\sqrt[7]{m^2}n^4w^2}{7}$
$\left(x^2-y^2\right)\left(x-y\right)$
$x+5>9$
$\cos\:76^{\circ\:\:}\cos\:16^{\circ\:\:}+\sin\:76^{\circ\:\:}\sin\:16^{\circ\:\:\:}$
$\left(12\right)\left(-27\right)$
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