$\frac{tanx+cotx}{secx}=cscx$
$x^2y'-xy=y^2-x^2$
$4x\le\frac{5}{4}$
$\left(4+3i\right)^3$
$4cos^2x-3=0$
$\int2ae^{a+bx}dx$
$\int5sin^2\left(x\right)dx$
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