(t+3t²-3)-(-t+4t²)

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(t+3t²-3)-(-t+4t²)

(t+3t²-3)-(-t+4t²)
(t+3t²-3)-(-t+4t²)

(t+3t²-3)-(-t+4t²)
(t+3t²-3)-(-t+4t²)
=t+3t²-3+t-4t²
=-t²+2t-3