$26\cdot56$
$\sin^2\left(\frac{x}{2}\right)-\cos^2\left(x\right)=0$
$x^2+2<1-2x$
$6x^2\cdot3^3+18x$
$-7x-2-9y+10x$
$x+4=11$
$\frac{2m-10}{5}=32$
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