$\left(3x^4-5\right)^3$
$\left(b^2+4b+4\right)\left(-b+3\right)$
$3xy^2\left(4x^2y\right)^2$
$x^2-18x+x$
$\cos\left(a\right)\sec\left(a\right)-\cos\left(a\right)=\sin^2\left(a\right)$
$\left(2a-c-d\right)\left(2a-c+d\right)$
$x^2-2x+1=9$
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