$74\cdot\left(-74\right)$
$\frac{x^7-4x^4-2}{x^2+1}$
$sec^2e\left(cot\:e\right)$
$3^{2}-10$
$\sqrt{x}\left(x^2+2x+\sqrt{x}\right)$
$4\sin\left(2x\right)\sin\left(x\right)+8\cos\left(2x\right)\cos\left(x\right)$
$2ab\left(a+b-c\right)-3x\left(-a-b+c\right)$
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