$7\cdot2^5-3\cdot2^4+2\cdot2^3$
$\tan\left(x\right)-\sec\left(x\right)=\frac{\cos\left(x\right)}{1-\sin\left(x\right)}$
$3+\frac{2}{x}$
$4x^2<1$
$7.42-5\left(-1.6z+2.4\right)$
$\lim_{x\to0}5x$
$3ax+4bx$
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