$d2ydx2+25y=sec2\left(5x\right)$
$\log_b\left(x+1\right)=\log_b\left(x+2\right)$
$\lim_{x\to0}\frac{1-cos^2\left(x\right)}{3x}$
$\frac{\left(-24x^4-16x^3-12x^2\right)}{4x^2}$
$3x=12x-99$
$3x^2-2x-4=0$
$\left(4x^6-y\right)dx\:+\:\left(5y^2-x\right)dy\:=\:0$
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