$\left(8x\:-\:5\:+\:2y\right)^2$
$x=-4x^2+12x-9$
$x^4+8x^2+16-4x^2$
$4sin\:2x\:+\:4\:sinx\:+\:1\:=\:0\:$
$6x\:-\:45\:\le\:15x\:-\:12\:$
$-15+5\left(-2\right)$
$\left(5x^4y^2\right)\left(x^3y^6\right)$
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