$\left(6p-2t\right)$
$\frac{\sin\left(5x\right)}{\sin\left(x\right)}-\frac{\cos\left(5x\right)}{\cos\left(x\right)}=4\cos\left(2x\right)$
$1+\left(-16\right)+\left(-15\right)$
$\left(3xy+5y\right)^2$
$\left(3x-7\right)\left(3x+19\right)$
$12x^2+18x$
$16y^2+24y+9$
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