$5cos^22x$
$9^{\circ}c+\left(-5^{\circ}c\right)$
$\cos\left(2x\right)\cos\left(x\right)=\cos^3\left(x\right)-\cos\left(x\right)\sin^2\left(x\right)$
$3q-5m+5s-2q+4m-7s$
$\lim_{x\to1}\left(2x-3\right)^2$
$\left(r+4\right)^7$
$8\sin\left(8x\right)+9=3$
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