$\left(2c-4\right)\left(2c+4\right)-\left(4c-2\right)^2$
$\frac{1}{\left(x^{-2}+1\right)}$
$-8=v-6$
$\left(\frac{a}{2}\right)^4\frac{\left(8a^5\right)^2}{a^{-1}a^{10}}$
$a=15x+8x+13x$
$\left(3ab+2c\right)^2$
$-tan\left(x\right)-sin\left(x\right)$
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