$cos^2a+sin^2a+cot^2a=csc^2a$
$\int cos\left(3x+5\right)dx$
$\int_0^{\infty}\left(\frac{32tan^{-1}\left(4x\right)}{1+16x^2}\right)dx$
$\left(7+2\right)\left(-3-1\right)$
$\left(4z+2\sqrt{z}-2\right)\left(2\sqrt{z}+5\right)$
$a^2+2a+3a+3a^2$
$\sin\left(7x\right)\cos\left(5x\right)-\cos\left(7x\right)\sin\left(5x\right)=\cos\left(x\right)$
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