$\left(2x^3+5b^2\right)\left(2x^3-5b^2\right)$
$\left(a^2b^3-c^5\right)^2$
$2\sin^2x+5\sin x=3$
$\left(x-2y+4\right)\left(x+2y-4\right)$
$4d^3\:+\:16de^2\:-\:20df^3$
$\frac{\left(3x\:+16x+20\right)}{\left(x-3\right)^2}$
$3y-7<-14$
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