Advanced math operations in TapScript?
BIP 342 does not add any of these opcodes, and it is not possible to perform elliptic curve operations in it.
The only new/changed opcode semantics in BIP342 are:

Schnorr signatures instead of ECDSA.
OP_CHECKSIGADD instead of OP_CHECKMULTISIG(VERIFY).
OP_SUCCESSx opcodes for future extensibility
Unknown pubkey types for future extensibility.
Changes in resource accounting/limits.