$cos^2\left(x\right)=\frac{1}{8}$
$\left(x^{10}\right)=10x^9$
$25x^2-35x+49$
$50^2+2\left(200\right)^2+4^2$
$64 \times 4 + 176 x ^ { 2 } + 121$
$\left(7x^4+y^3\right)\left(7x^4-y^3\right)$
$\frac{-x^2}{2}+8x$
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