$a\left(x\right)=abx2+\left(3a+4b\right)x+12$
$5+\frac{3}{4}+\frac{3}{4}+\frac{3}{4}+\frac{3}{4}$
$x^2+4x+4+x^2-8x+16-x^2+3x$
$\left(+2\right)\cdot\left(-3\right)\cdot\left(-4\right)$
$\left(-6\right)-\left(-10\right)$
$-450\:x-5400$
$tan^2x+cot^2x=sec^2+csc^2x-2$
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