$12x^2-5^4$
$\left(4m+20\right)$
$\theta=\frac{h+x}{h}+\frac{x-t}{1-x}$
$\lim_{x\to0}\left(\frac{\ln\left(1+x^2\right)}{\sqrt{x}\sin\left(x\right)}\right)$
$3\cos\left(2x\right)+\cos\left(x\right)=\:2$
$\frac{a}{bc}+\frac{b}{ac}+\frac{c}{ab}$
$xy^2+3y^2=x+y^2$
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