$27.22\cdot45.88$
$f\left(x\right)=\left(3x+1\right)^7$
$100a^2-64b^6$
$-4\:.\:7$
$2x\:\:-1y\:\:+3z\:\:=\:\:-1$
$x\left(\frac{\sin\left(x\right)}{\cos^2x}\right)-\left(\frac{1}{\cos\left(x\right)}\right)\tan\left(x\right)=0$
$-3x+5<8$
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