$x\left(\sqrt{16-4x^2}\right)$
$x^2+90x+900$
$5x^2+4x+3-3x+2x^3-7x^2+6x$
$\left(-2\right)\left(2\right)\left(-5\right)\left(3\right)$
$2\left(x+1\right)=-2$
$-\left\{5+\left[3-132:\left(-2\right)\right].7\right\}$
$1-tan^22x$
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