$3x-6=12\:$
$\left(x+a\right)^2=x^2+2\cdot\left(x\cdot a\right)+a^2$
$64\:x^2\:-\:\:9\:y^2\:\left(\:5\:y\:+\:1\:\right)^2$
$\frac{d^2}{dx^2}\left(6x^3+3x^2-10\right)$
$x^4+64x^2-32$
$\pi\int_0^{45}\:\left(\sin^2\:x\right)dx$
$\frac{x^6-\:y^6}{x+y}$
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