$\left(5sb^2\right)^3$
$\sec^{2}x\left(1-\sin^{2}x\right)=1$
$-200+1500$
$\left(4x^3+5x^2\right)\left(6x^2+2x\right)$
$3\left(x+2\right)-4\left(4+3x\right)\ge\left(2-x\right)-3\left(x-5\right)$
$-36-\left(4\cdot16+2\cdot1\cdot9\right)$
$-4\cdot\left(-7\right)$
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