$\int\left(\tan\left(y\right)\sec\left(y\right)\right)dy$
$\sin\left(a\right)\cos\left(b\right)+\sin\left(90-a\right)\cos\left(90+b\right)$
$\frac { 216 + r ^ { 3 } } { 6 + r }$
$\left(ab-8\right)\left(ab+5\right)$
$\log\left(2y-10\right)=7\cdot\log2-\log8$
$\sec\left(x\right)-4=-\sec\left(x\right)$
$2x^2-12x+23$
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