$sinx=-\frac{\sqrt{7}}{3}$
$12\left(1+7x\right)-4\left(-12x-8\right)$
$\left(x^2-1\right)y=16$
$20+5+0.75+0.10$
$\int\frac{x}{\cos\:^2\left(x\right)}dx$
$3\left(2x+4\right)+x-1$
$\frac{36x^5}{50x^2}$
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