$sin30^{\circ}cos45^{\circ}+cos30^{\circ}sin45^{\circ}$
$\lim_{x\to\infty}\left(8x^2+4x+3\right)$
$\left(1+x^2\right)\frac{dy}{dx}=2xy$
$csc2x+1=\frac{\left(sinx+cosx\right)^2}{sin2x}$
$\frac{4a^2b^7}{2a^5b^7}$
$4\cos^3\left(x\right)-\cos\left(x\right)$
$4x^2-13x+20+5x^2+8x-9$
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