$\left(\frac{3}{4}w+9z^3\right)^2$
$2\sin x+3=\sin x$
$-3\:-1\:-5\:+\:15\:-12$
$\left(8x^4-2c^2\right)\left(8x^4+2c^2\right)$
$\left(4x+11y\right)^2$
$\left(4x^2+3x-7\right)+\left(-7x^2+17x-13\right)$
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