$\lim_{x\to0}\frac{10^x-1}{2^x-1}$
$\left(x^a\right)^2+3x^a-70$
$-4cos\left(x\right)-12=2\cos\left(x\right)-6$
$\sin\left(2x\right)=\frac{2}{\csc\left(x\right)\sec\left(x\right)}$
$\frac{3}{8}x+\frac{7}{16}x=26$
$2x+34=2x-34$
$7x^2-3\left(x+6\right)$
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