$-3\left(4r-8\right)=-36$
$\frac{1+tan^2\left(a\right)}{csc^2\left(a\right)}+sin^2\left(a\right)+\frac{1}{sec^2\left(a\right)}$
$\sqrt{\left(2\sec\left(x\right)^3\right)-4}$
$\sqrt{\frac{x-7}{\sqrt{\sqrt{x}}}}$
$6x+5>4x+11$
$4x-22x+121$
$y'=k\left(y-20\right)$
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