$\left(5\right)\left(-2\right)\left(-1\right)\:\left(-8\right)$
$5x+4y=44$
$\left(\tan\left(7x^2\right)+\sin\left(8x\right)^2\right)\cdot\frac{1}{x^2}$
$x ^ { 2 } = 16 x - 63$
$\lim_{x\to-2}\left(3x^4-5\right)$
$\left(10a^2-5b^3\right)^2$
$\left(x^2+4x+4\right)-\left(x^2-1\right)$
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