$\left(11x-10y\right)^2$
$\left(25-a\right)\left(25+a\right)$
$\left(x+5\right)^2=49$
$\left(x^2+2x+1\right)\left(4x^2+8x+16\right)$
$x^6-6x^3-7$
$\frac{d^2y}{dx^2}=x^2+5\cos\left(x\right)+3$
$7x+18\ge x+6$
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