$sinx-sin3x$

$2\sin^2\left(60\right)-5\sin\left(60\right)=-2$

$\left(\sin\left(a\right)+\cos\left(a\right)^2\right)-\tan\left(a\right)\cdot\cos^2\left(a\right)=1+\sin\left(a\right)\cdot\cos\left(a\right)$

$121p^{4}-144q^{8}$

$x\ln\:\left(a^2+x^2\right)-\int\:\frac{2x^2}{a^2+x^2}dx$

$\left(x+2\right)\left(x+3\right)\left(x-1\right)\left(x+1\right)$

$\left(3n^4\right)^2$